4L60E Power Flow (1st, 2nd, 3rd, & 4th Gear) (Automatic transmission power flow)

[@SouthpawAutoworks]

Thank you for being here! If it feels right to you, help me spread the word about this channel… 1 Handed Transmission Rebuilder (60 sec): kzbin.info/www/bejne/kIKrpaWMe7p7ms0

[@janetmichellehumphres3339]

Great job

[@ice4278]

Southpaw I have looked at a lot of transmission bills or show how to build and you are the best. Excellent teacher not only talks they show you every detail without missing anything. Keep up the excellent work.

[@frankensteinrules6511]

You are a very good instructor. Even a 70 year old like me can understand. Thanks for your videos, keep um coming.

[@SouthpawAutoworks]

Doing my best. Thanks for dropping me a line! Much appreciated.

[@SergioOrtiz-c9r]

The best instructor I ever seen in my life . Thanks for all .

[@coleknight7529]

This reaffirms my attitude toward machines, that nothing is really that complex. Only well timed and precisely machined. Awesome video

[@AlwaysRightSometimes]

This is the first video of yours that I have watched . I am impressed . I have always thought that the automatic transmission was the most complex and interesting part of an automobile . Therefore with the help of KZbin , I have been watching and learning the subject . The explanations that you are giving are what I have been looking for . Thank you for taking the time to do this . I will be watching your videos multiple times so I can get a good understanding on how these things work .

[@SouthpawAutoworks]

Right on! Welcome aboard! I'm currently working on a video that shows how the operation the 1-2 shift valve + solenoid. It shows oil flow throughout the applicable parts of the trans, valve movement, etc. Hoping to have it done today... Here's a 60-second preview of my latest project. 4L60E AFL Valve: kzbin.info/www/bejne/r5e7latsdtCkoLc Thanks for dropping me a line! PS - If it feels right to you, please help me spread the word about this channel. 1 Handed Transmission Rebuilder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c

[@justinArk-Box]

Still seems complex but what a great breakdown

[@FourSeasonsNorth4x4]

Basically ditto. He said what I wanted to say…I’m gonna stick with this so the ‘automatic transmission’ is no longer a mystery or some voodoo magic between the engine and the transfer case(in my situation) or drive shaft for many. Many thanks for this and I wish your channel well. 👏👏 👍👍

[@SouthpawAutoworks]

I've got plans to simplify these topics even more. Bite-sized... Thanks for your comment, Justin.

[@SouthpawAutoworks]

Appreciate you taking the time to drop me a line, Four Seasons.

[@MorganOliff]

Wow, Expertly taught from someone who clearly has a grasp of everything going on inside these machines! Much less intimidating after watching this.

[@beausw]

Man oh man, I can get an engine inside out and backwards, Standard transmission, perfect sense. Auto trans have always been Voodoo before this. I had no Idea. This is great. Thanks for posting.

[@SouthpawAutoworks]

Right on. Glad you enjoyed it. If you're interested in learning about the hydraulics, or the electrical... 1-2 Shift Valve: 4L60E: 1-2 Shift Valve + 1-2 Shift Solenoid (Part 1) Basic Operation kzbin.info/www/bejne/oIHLnmpsh6mtbLs Shift Solenoid: 4L60E Shift Solenoid - Part 1 (Basic Operation) kzbin.info/www/bejne/fJKmmYqjmNh0nas 4L60E: PR Valve (Part 3) Torque Signal Oil Pressure (4L60E Line Pressure) kzbin.info/www/bejne/hoqUpaWQmrGkiq8 Thanks for dropping me a line.

[@carshopper-sr1uq]

I have built a few 4l60e That was the best description I have ever watched great video. :-)

[@SouthpawAutoworks]

Right on! It's a fun transmission to build. Thanks for dropping me a line! PS If you're interested in spreading the word about this channel...here's an easy way to share with friends, family, FB groups, automotive forums, etc. (Roughly 60-second video) 1 Handed Transmission Rebuilder: kzbin.info/www/bejne/g6fZZnaaZ8iJjZY

[@voidisyinyangvoidisyinyang885]

I've watched probably a dozen 4l60e vids in the past several days and this is the ONLY vid that truly explains how the gears work. Very fascinating and very clear. I'm getting a rebuilt 4l60e done tomorrow. I'll watch your other 4l60e vids now. Thanks for the great instruction.

[@SouthpawAutoworks]

Thank you for the feedback. That's great news. You're very welcome. Thanks for dropping me a line!

[@voidisyinyangvoidisyinyang885]

@@SouthpawAutoworks 1 year later - put 15K on the Reman Trans 4L60e. I'm planning to install a magnefine external filter soon. I did a fill tube "flush" 1 quart out/1 quart in after some gear shifting engine running - so mathematically I think that is 75% new fluid now. The engine seems to run smoother now and the 15K ATF had a slight burnt smell to it! I didn't see any metal though but since a TSB was sent out to add a 2nd magnet - I figure an actually Inline filter-magnet would be better. Any comments - planning on just removing the front cooler return line section and then using brass quick connectors with the e-clips for a flexible transmission hose connecting to and from the filter - resting on that splash guard.

[@151bradhatt]

It amazes me that someone can just think this stuff up on a piece of paper and actually make it work

[@SouthpawAutoworks]

I feel the same way! Truly amazing... If you haven't watched em already, you'll probably enjoy the videos about hydraulics, too. Here's the latest... 4L60E Shift Solenoid - Part 1 (Basic Operation) Preview kzbin.info/www/bejne/gImpm4CiqNacqNU

[@80fiatfreak]

Excellent video series. I appreciate your teaching style and am absolutely amazed at your ability to present things in a sensible and easily understood way (and one handed, no less!) You have inspired me to attempt a transmission repair on my 4L65E, it lost 2nd and 4th gears but i still have reverse. I'm going to attempt replacing the band to see if I can get away with a cheap fix to get a few more miles out of it. Thank you for the instructional and informative video

[@PullStartStables]

I have had many transmissions apart and replaced many parts. I’ve never understood how it all works, but it always does! Thank you for this info!

[@jakenbaked87]

I've seen a ton on general explanations on how the transmission works, but none actually show the gears in motion like this. Most useful video for understanding how a transmission works! Thank you!

[@SouthpawAutoworks]

Right on. Glad it was useful. Thank you for dropping me a line.

[@leomenchey3726]

Thank you for many many years I've always been Afraid because I did not understand the entire workings of an automatic Transmission the way you explain that in detail makes me more comfortable

[@SouthpawAutoworks]

Right on! That's awesome!

[@jaronvaughn4520]

This the first video of your that I have watched. I have been wanting to know how this worked for a very long time. You just earned another subscriber. Thank you for the great video👍

[@SouthpawAutoworks]

Right on. When time permits, there will be more content like this. Appreciate you dropping me a line (and subscribing).

[@dakotapoe2890]

Great job bud helped me understand 4l60e a little bit better now and I really hope to ur video take off ik I'll start supporting you know that I found you on here

[@SouthpawAutoworks]

Right on! Thank you for dropping me a line! Much appreciated. PS - If it feels right to you, please help me spread the word about this channel. Here's some easy ways to share... 1 Handed Transmission Rebuilder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c How the 4L60E valve-body works: (60-Second Preview) kzbin.info/www/bejne/nIizhJSCmsaCjqs

[@SouthpawAutoworks]

You're very welcome. I'm glad you enjoyed it. Thank you for being here. Thanks for dropping me a line! PS - If it feels right to you, please help me spread the word about this channel. Here's some easy ways to share... 1 Handed Transmission Rebuilder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c How the 4L60E valve-body works: (60-Second Preview) kzbin.info/www/bejne/nIizhJSCmsaCjqs

[@frankv6263]

Keep up the great work! You might have only one full arm but damn you do better work than most that have two full arms 🤯

[@Jakevrana]

Hey boss, I grew up in a transmission shop, my dad is a 45 year vet when it comes to building trannys and I have picked up the torch as well. What draws me to your channel is a similarity to my dad. Now as I say this next part just know it’s a complement…….. my father could have collected disability benefits from the age of 12 due to a car accident, but instead of that he became a successful business owner and never used his handicap as an excuse to slow him down. He has been an inspiration to me to not make excuses, so with you only having one hand and still being a master at your craft is a motivation to me to not make excuses and with enough effort and determination, you can do anything. Keep up the good work, letting people know that you can have a great and rewarding career by getting your hands dirty. Thanks for the video

[@SouthpawAutoworks]

That's awesome about your dad. I really appreciate you taking the time to share your thoughts. Thank you for dropping me a line.

[@Spidercarfix]

Learning from your videos from my poor country Haiti, thanks for the great explanations!!

[@SouthpawAutoworks]

Right on! Glad you enjoyed the presentation. Thank you or dropping me a line.

[@RandomGuyDan]

Only watched part of the video, but I'll watch the rest tomorrow. I'm in the process of rebuilding a 4l60E from a 2004 Envoy XUV with the 5.3 LS. Someone abused the crap out of it, but when I'm done it will be better than new.

[@SouthpawAutoworks]

That's exciting! Thanks for dropping me a line! Here's another one that you might like. Here’s a 60-second preview of the AFL Valve: kzbin.info/www/bejne/r5e7latsdtCkoLc

[@zakpeterson6713]

Best and simplest description ive seen on the 4L60. Thank you.

[@SouthpawAutoworks]

Glad it was helpful!

[@mikehanlon9773]

Great demonstration showing internals.Im a transmission tech and find it amazing how all this was engineered to work as it does.

[@SouthpawAutoworks]

I'm in awe of the engineering, too. The mechanical, the hydraulics... All of it is wild. Appreciate the feedback. Thanks for dropping me a line.

[@brentblume2837]

Thank you so much. I have a 2006 trailblazer. This helps me to understand what is happening when I put my gear in Drive. Also, I understand a little better why it runs so smooth going down the highway despite its age and mileage. I do wish they could have come up with a overdrive gear.

[@Spector_NS5_RD]

Your 2006 Trailblazer has an overdrive gear. 4th gear in the 4L60e transmission is the overdrive gear ~ 0.70:1 ratio. The input shaft is at a 0.70 and the output shaft is at 1.00 creating an overdrive.

[@mattsolis4142]

Dude you are awesome! Want to say thank you ! For expanding my knowledge. GOD BLESS YOU !

[@FilterYT]

It is one of the coolest inventions, fascinating. Thanks!

[@SouthpawAutoworks]

No doubt! You bet.

[@TBD3.0]

Take notes this video is filled with a wealth of information. 👍🏻 worth every single minute of this video watched.👍🏻

[@SouthpawAutoworks]

Wow! Thank you for that.

[@champspec]

Well explained in detail. I’ve rebuilt about 50 of these and learn something new each time.

[@SouthpawAutoworks]

Right on! If you're interested in learning more about how the 4L60E works, check out these videos. I'm still working on finishing this series...and I'd like to go back and re-do the earlier videos. Hydraulics: How it Works (4L60E) kzbin.info/aero/PLMK9OC5NGhbhvj11GajN0Mcg0k3YgsRK- The positive feedback is appreciated. Thanks for dropping me a line. Happy building.

[@caliman823]

So complicated yet so simple. Very impressed with your ability to work without your hand. I broke both wrists and my left elbow years ago. I also wrench for a living and sometimes not being able to flex my wrists correctly makes it complicated.

[@SouthpawAutoworks]

Both wrists and an elbow!? That must've been a difficult recovery...from two hands, to no hands. Glad you're back to wrenching. Complicated....I totally feel you. Thanks for dropping me a line.

[@peterarvaszulu5069]

Wonderful tuition,if I knew where to find you I would come for practicals now. Thank you

[@bobbytwilley1789]

Perfect video wish I had found your channel years ago

[@SouthpawAutoworks]

Glad you found the channel! Welcome aboard. The positive feedback is appreciated. Thanks for dropping me a line. PS If it feels right to you, please help me spread the word about this channel. 1 Handed Transmission Builder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c

[@CarlosCastillo-cg1ou]

I'm starting to understand what you had shown about each component works. Thanks for that example

[@SouthpawAutoworks]

Right on! Glad you got something of value out of the video. I saw your other comment (2017 silverado 4.3L). Just haven't had a chance to respond. I will say that the 4L60E was phased out of the GM lineup in 2013/2014...depending on model of vehicle.

[@1320pass]

Fantastic explanation on a very versatile transmission and successor to the TH700R4.

[@SouthpawAutoworks]

Glad you enjoyed it. Thanks for dropping me a line, 1320pass.

[@Aintright890]

I am trying to learn how to rebuild an automatic transmission as a hobby .I am and have been watching all your videos several times THANK YOU ...

[@SouthpawAutoworks]

Right on! I'm excited for you. Thanks for dropping me a line! PS - If it feels right to you, please help me spread the word about this channel. Here's some easy ways to share... 1 Handed Transmission Rebuilder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c How the 4L60E valve-body works: (60-Second Preview) kzbin.info/www/bejne/nIizhJSCmsaCjqs

[@bhuoindersingh8586]

Really appreciate sir ,,im from india, working in kuwait 🇰🇼 and watching your channel 👍

[@SouthpawAutoworks]

Awesome. Thanks for dropping me a line.

[@peterpurol7873]

THANKS FOR ALL THE HARD WORK MAKING THESE VIDEOS AND THEIR CONTENT!

[@SouthpawAutoworks]

Thanks for dropping me a line.

[@scottr4086]

Really enjoyed your video. Helps me understand the basics, look forward to watching your other videos on the 4L60E

[@Kstang2790]

Thanks bro helped me with my 4th year schooling

[@SouthpawAutoworks]

Awesome!

[@stevearmstrong4561]

Perfectly explained and delivered.

[@SouthpawAutoworks]

Thanks for dropping me a line!

[@MrSFSTUDIOS]

Thank you for this very clear explanation. Now I understand how my 4L60e automatic works and why it is so expensive to rebuild one. So many parts have to be be installed perfectly or the transmission won't work or last very long. I can also see how important it is to regularly service the transmission to prevent grit from accelerating wear on the clutch-packs and bands.

[@davidwostrel]

Great job, that was really great explanation. I was getting a noise in reverse, first and third and now I know it is related to the transmission for sure because of the 2-4 band, unfortunately that just means I need a rebuild but now I understand what is going on inside just a little better!

[@SouthpawAutoworks]

Glad you got some value out of the video. Thanks for dropping me a line.

[@castledomeknives9395]

W O W....Lots of good info...I'm impressed....lots of engineering in them transmissions

[@SouthpawAutoworks]

I'm blown away that people were able to create the planetary gear set. Pretty amazing... Thanks for dropping me a line!

[@yachtsteve]

Watched it 3 times so far, I expect to watch quite a few more in the future

[@SouthpawAutoworks]

You're like me... I, too, watch/read stuff over and over. The repetition helps the info sink in. When time permits, I'd like to update these videos (animate them). Might make for a better viewing/learning experience. Thanks for dropping me a line!

[@douglash3129]

You are making info penetrate my cement head, very nice presentation Thank You!!

[@SouthpawAutoworks]

Glad it was helpful! Appreciate you taking the time to drop me a line.

[@ronaldpoe3569]

Also for only having one hand u have over come the loss so we'll I don't think I could do a great of a job as you well done keep vids coming have told my friends about your channel very informative well done will pass the word on for you

[@SouthpawAutoworks]

Appreciate you helping the channel grow. 1 Handed Automatic Transmission Builder: (60-Seconds) kzbin.info/www/bejne/r2S5mquXlKqWZ6c

[@JohnSmith-wb6kq]

Outstanding video mate, well done 🙂

[@JOHNPHUFNAGEL]

great job explaining this

[@SouthpawAutoworks]

Thanks for dropping me a line! PS If you're interested in spreading the word about this channel... 1 Handed Transmission Rebuilder (60 sec): kzbin.info/www/bejne/g6fZZnaaZ8iJjZY

[@10malabdullah10]

Great job, that was really great explanation.

[@SouthpawAutoworks]

Appreciate the positive feedback.

[@efijemuehphilip542]

Thanks for this video.i am so impressed.I have a problem at hand and with this knowledge you have impacted I believe am close to getting the answer.I have a Suzuki aisinA172

[@SouthpawAutoworks]

Glad it was helpful! Thanks for dropping me a line!

[@joshuaharvey5671]

Great video, 👍 do you have any videos on upgrading 4l60e or videos on transfer cases used with 4l60e and upgrades thanks ill continue watching

[@SouthpawAutoworks]

Currently we do not have any videos covering 4L60E upgrades. However, that's definitely on the to-do list! We're gonna be putting together a T-case video, before too long. Unfortunately, it's not one that's compatible with the 4L60E. But, we will get to doing other T-cases, in good time. Thanks for dropping me a line!

[@dwreed63]

Excellent 👍👌 Thank you for this, really helped me understand things.

[@SouthpawAutoworks]

Right on! Thanks for dropping me a line.

[@7080nik]

Great video! Subscribed . Very informative. Just with you were doing a Turbo 400 like I have in my 70 SS Chevelle hot rod. Its crazy all the stuff going on in an auto transmission. Most people dont have a clue Surprised they are as reliable as they are.

[@SouthpawAutoworks]

Thanks for the sub! It really is crazy how much is going on in there. You and me both. Thanks for dropping me a line.

[@tamarapipkin7675]

Your explanations are excellent and easy to follow!

[@SouthpawAutoworks]

Positive feedback is always appreciated. Thanks for dropping me a line!

[@timtrial3971]

I have an a245e transmission that I want to modify. I've found it hard to find good quality videos that show the fundamentals. Thanks so much for taking the mystery out of these contraptions. I'm particularly interested in the control systems

[@SouthpawAutoworks]

We've got a number of other videos in the works. Stay tuned! PS - If it feels right to you, please help us spread the word about this channel. 1 Handed Transmission Rebuilder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c 4L60E AFL Valve - Part 1: (60-Sec Preview) kzbin.info/www/bejne/r5e7latsdtCkoLc

[@timtrial3971]

@@SouthpawAutoworks thanks. I'll help all I can

[@user-du8cs8sn2v]

Fantastic! Best explanation I have seen.

[@SouthpawAutoworks]

Right on! Glad it was helpful.

[@richarddiaz8248]

It’s amazing engineering

[@SouthpawAutoworks]

Right!

[@صيانةالسياراتعلموخبرة]

very clear explanation

[@SouthpawAutoworks]

Glad you got something out of it. Thanks for dropping me a line.

[@leob4331]

Excellent job dude; you are awesome!

[@SouthpawAutoworks]

Glad you enjoyed the video. Thanks for dropping me a line.

[@leob4331]

@@SouthpawAutoworks hey bro, I got a question, seems like you have a lot of experience with transmission, I have a 94 trans am 5.7, when I push the gas to the floor taking off ot sounds like its grinding on something and dosen't wants to go then a big clunk then finally goes, I changed fluid , filter, torque converter and this is the fourth time that I dropped the transmission; I opened up and didn't find nothing wrong with it , the only thing that I found is that it didn't have a piston in the accumulator in the case but that's about it, also last time that I changed the filter I found some chunks of metal on top of the filter, but I didn't see anything missing or broken; any idea what I should be looking for? I don't know anything about transmission and any help would be appreciated , thanks in advance

[@leob4331]

*was missing the pistons that controls fourth gear

[@jasonbrown467]

excellent video. i work in IT but i do my own automotive work.my 4l60e wont shift into 3rd, it behaves as if it in neutral. this started 1 week after a trans cooling like broke and let all the fluid leak out. i suspect my 3-4 clutch is bad, but had no idea how any of this stuff works. i appreciate when people care enough about their job to actually understand theory of operation, which is unfortunately rare these days, i appreciate it even more for your sharing this info with us, and care the most because of your prepared presentation. you clearly know what you are doing and thought about how best to present this information to us, thank you

[@SouthpawAutoworks]

It sounds like the 3-4 Clutch has failed. Super common point of failure on the 4L60E. Cooler line blew off while driving the vehicle? That's a bummer. What a mess... Thank you for that helpful info. If the line blows off while the vehicle is cruising down the road, this causes a sudden drop in oil level, to the point where the pump is no longer able to receive oil from the pan. As the pump starves for oil, it's no longer able to supply enough pressure to the clutch. The clutch slips, which creates heat, and burns the clutch pack. The clutch is metal that has a paper friction lining bonded to the metal. These lines like to blow off when the vehicle is cruising down the HWY...in 3rd/4th gear. So, that's the clutch that get's affected. The trans will need to be taken apart, in order to replace the 3-4 Clutch pack. The piston, that applies the clutch, should also get replaced....among other things. The positive feedback is appreciated.

[@seshachary5580]

very educative. Thank you regards

[@indiankite7358]

Excellent video!

[@SouthpawAutoworks]

Thanks!

[@Mike-xt2ot]

Great tutorial!

[@SouthpawAutoworks]

Thanks for dropping me a line!

[@joebushell2438]

😢very good video,thank you sir

[@PnwTinkerer]

Excellent video!!!!! Thank you!!!!

[@SouthpawAutoworks]

Appreciate the feedback.

[@BlainShobe]

I believe this confirms I have welded the forward clutches on a 1990 4l60. I was doing some tuning watching scan data while brake torqing and when I put it in reverse to back out of the shop it went nowhere. I shut the engine off and pushed it out of the shop. I have all forward gears and neutral pulls forward like low gear. I had another trans on the bench I had just built with many upgrades so I put it in and will tear down the other replacing the forward clutches and steels and of course all of the soft parts from there out. It was a really good shifting unit that had successfully handled plenty of power for only about 10,000 miles before I made this stupid mistake. If you have any suggestions they are appreciated.

[@SouthpawAutoworks]

It sounds like you're on the right track. Based off of what you described, it does sound like the Forward clutch is stuck on (due to damage). Under that condition (brake torquing) the line pressure must be elevated high enough in order to prevent the Forward Clutch from slipping (and burning up). If you haven't done so already, you might want to attach an automatic transmission oil pressure gauge (must read higher than 300 psi), to your currently installed unit. You'll want to verify that the line pressure is rising high enough when the trans is under full load. You mentioned a "1990 4L60." This trans is controlled by a governor and a TV cable (Throttle Valve). The TV cable is used to influence line pressure. Line pressure is used to apply the clutches. Low line pressure can be caused by a number of things. What method did you use to adjust the TV cable?

[@BlainShobe]

​@@SouthpawAutoworksTV cable at full extension at WOT but I also have the spring loaded sonnax kit that increases TV at lower throttle angles.

[@donjuan4925]

Great video! Thank you!

[@SouthpawAutoworks]

Glad you enjoyed it.

[@efijemuehphilip542]

Hi, thanks for this video.Yoiu didn't talk about how the reverse happens

[@SouthpawAutoworks]

Reverse will be covered in a separate video, in the future. Appreciate you dropping me a line.

[@rubberbandman2540]

really awesome video thanks mate

[@SouthpawAutoworks]

Glad you enjoyed it.

[@MauricioProfessor]

Parabéns! Ótimo vídeo. 🤗

[@SouthpawAutoworks]

Obrigado.

[@justinArk-Box]

Never seen anyone do such a thing for us enthusiasts

[@SouthpawAutoworks]

Who's your buddy? Who's your pal?

[@justinArk-Box]

@SouthpawAutoworks i cant fathom the time aggravation into editing videos. Suppose its more than a tranny drop n rebuild. I have 545rfe. So same principle for 1-2, 2-3, 3-4 tcc solenoid isnt it. Same goes for line pressure? 25psi at 65 cruise with MDS solenoid unplugged. I cant stand MDS. Going to flash/delete someday. Been losing 4 and OD sometimes. Use to have a little shiver when it would go OD but now seldom.

[@justinArk-Box]

So when i lose high gears i found i have to disconnect battery or sit overnight and woolah.

[@markgriffin847]

So much great info. Thank you

[@SouthpawAutoworks]

Right on! Glad you enjoyed it. Thanks for dropping me a line!

[@jraydelatorre]

I thoroughly enjoyed Robert I’m currently watching I’m looking for in specific description as to why three four apply gear goes neutral and it’s on a transmission that was completely rebuilt supposedly

[@SouthpawAutoworks]

3-4 clutch failure is a common issue for the 4L60E. I'm gonna have to dedicate a video to that topic... Do you know what all was done to the trans during the rebuild?

[@jraydelatorre]

@@SouthpawAutoworks The issue I’m not familiar with 3-4 clutch failure or neutral on hwy yet clutches appear to still be new my guess would be limp mode or Valve body issues and EPC solenoids are bad/ leaking

[@SouthpawAutoworks]

I have an idea...but, I better make sure we're on the same page, first. Based off of the road test, you suspected a 3-4 clutch failure? However, after getting the trans apart, you found the 3-4 clutches to be in great shape? Am I understanding this correctly? Questions: 1). With the trans shifter placed in OD Mode (D), 1st and second gear worked correctly? 2). What happens when trans shifted to 3rd gear? 3). What happens when trans shifted to 4th gear?

[@jraydelatorre]

@@SouthpawAutoworks Pretty close but when shifting. the fourth gear and lockup went neutral. I was not there when they tested it. It was a new install of a remanufactured transmission. I was also told when you Manual shifted only had two and three no first no fourth

[@jraydelatorre]

Also I haven’t confirmed but I have a suspicion. they did not properly flush and they may have used an existing torque converter from the previous transmission. failure re-introducing clutch and metal shaving material into the remanufactured transmission

[@hosalabad]

Great video.

[@SouthpawAutoworks]

Glad you enjoyed it.

[@mrcodesteez1211]

thanks bud great video

[@SouthpawAutoworks]

Thanks for dropping me a line.

[@williamlopez4934]

Thank for the video . Helps a lot I just rebuilt my 4l60e think I got a problem feel like it go in and out 3 to4 gear only at 50mph. Am guessing is the band

[@SouthpawAutoworks]

When the problem occurs, can you watch the tachometer? How much is the RPM change/drop, as the trans cycles back and forth between gears?

[@williamlopez4934]

@@SouthpawAutoworks that's for the replay. 50mph it happens I say 300rpm different. Also I disconnected the tcc lock up and it still does it.

[@efijemuehphilip542]

Thanks Sir for this video.I would like to know why automatic transmission won't take off in first gear while in drive range

[@SouthpawAutoworks]

It could be a number of things. Hard to say without having more info. Check engine light on? Codes? Trans recently rebuilt? Vehicle mileage?

[@efijemuehphilip542]

Hi Thanks for this video.I have watched this video severally to fully understand how it works.I am wondering whether a worn engine rod bearing can make the the automatic transmission not to shift easily into third gear without the crankshaft making knocking sound.

[@dale3645]

Are there any “for sures” on how to access a torque converter? If your 3-4 pack goes, should you always replace the torque converter. There are really no good videos on whether or not to replace it or when to replace it. Any ideas? Just always replace it?? (Mine, all the trans fluid left trans & when to the transfer case. Bad seals. Lost 3&4. Will drive good if shift in 2nd gear.). BTW. BEST VIDEO I EVER SAW ON HOW THE TRANS WORKS. UNBELIEVABLY NICE JOB.

[@SouthpawAutoworks]

There are indeed ways to test the health of a torque converter. When time permits, I'd love to make a video on that. When there's a transmission failure (both soft parts [clutches, etc] and hard parts [gears, bearings, etc]), contaminants will be circulated throughout the transmission. Those contaminants will make their way into the torque converter, the trans cooler, the valve-body, etc. The trans can be cleaned (during rebuild) and the cooler system can be flushed. However, the torque converter can not be easily cleaned...as it's a sealed unit. For the most part, torque converters are welded shut. They require a specialty shop, with specialty tools, to cut them open, clean them, and reassemble. If you rebuild a trans, and then reuse the torque converter, you'll likely contaminate your new trans, and cooler, with debris from the converter...which could result in a repeat transmission failure. Sorry to hear that about your 4L60E. A leak that could not be seen from the outside. That really sucks... Thanks for dropping me a line! PS - If it feels right to you, please help me spread the word about this channel. 1 Handed Transmission Rebuilder: (60-Sec Preview) kzbin.info/www/bejne/r2S5mquXlKqWZ6c 4L60E AFL Valve - Part 1: (60-Sec Preview) kzbin.info/www/bejne/r5e7latsdtCkoLc

[@dale3645]

Thanks!!!! Yes, not a drip on my driveway. I had just checked all the fluid levels a month earlier. Again, great video & I will share it.

[@RacquelWilson-bt3vm]

How do you tell witch sincor is 1-2 from 2-3

[@rod3404]

F shifted manually?

[@muhammedasharaf9246]

Very good infermasion

[@SouthpawAutoworks]

Glad you liked it. The positive feedback is appreciated.

[@matthewgluth412]

These are great videos. Thank you for making them. I have a 4l60e I am rebuilding with my son. We have it back together and now have no first gear. We have disassembled and checked both one way clutches, solenoid a, and the valve to be sure it moves freely. We have no first in any manual or drive gear. All the other gears work and shift well including reverse and TC lockup. Any thoughts on why we do not have first gear or where to look? Another note. The transmission had a shift kit when we took it apart and we noticed the valve is different than the manual we have if that is of importance. Thank you in advance for any help or guidance.

[@SouthpawAutoworks]

I remember reading your comment, and not having time to respond....but, I really wanted to. That's so cool that you're building a 4L60E with your son! Building memories... Were you able to get to the bottom of the problem? Was the 1-2 accumulator missing an o-ring?

[@matthewgluth412]

We found that the transmission was a B&M build and then we added a shift kit. There is no information on B&M and when adding the shift kit there were values and spring combinations that the transmission didn't like. We pulled all the B&M parts out and used the shift kit and she started working again.@@SouthpawAutoworks

[@GoatRopeGarage]

Great content! I've got an odd issue where I don't really have third but I've got 4th. It almost seems like it isn't getting enough pressure to engage three 3-4 pack. I've tried to trace it on a hydraulic diagram but man does it get complicated, lol!

[@SouthpawAutoworks]

It def gets complicated. ha. Especially as a whole. Fortunately, it gets a lot easier to digest when things are broken down into bite-sized chunks. Check out these videos to learn more about 4L60E hydraulics: Pump: kzbin.info/www/bejne/nXuYdJeGf9R9r8k PR Valve (Line pressure): part 1: kzbin.info/www/bejne/e33Le5-Qp86Xf7s ...part 2: kzbin.info/www/bejne/mnvPhpiZbpaenbs ...Part 3: kzbin.info/www/bejne/hoqUpaWQmrGkiq8 AFL Valve: kzbin.info/www/bejne/gqKlnJebnLWdhM0 Shift Valve: kzbin.info/www/bejne/oIHLnmpsh6mtbLs Shift Solenoid: kzbin.info/www/bejne/fJKmmYqjmNh0nas That's interesting... What do you mean by you "don't really have third..."?

[@GoatRopeGarage]

It isn't fully like neutral, it shifts in to third and the rpms shoot up, but if I get there throttle and keep them high enough it will slowly build speed until it shifts into 4th. I have better luck driving in manual second and then kicking to OD when the speed will be high enough to engage 4th It is almost like a hydraulic circuit is bleeding off pressure when in third but when it commands 4th the clutches have enough pressure to engage.

[@SouthpawAutoworks]

Thank you for the clarification. I'm gonna have to take a look at the circuitry, and fire back later. This one definitely has my interest.

[@SouthpawAutoworks]

What's the history on the trans? Lot of mileage? Recently rebuilt? If recently rebuilt, what was the original failure?

[@GoatRopeGarage]

@@SouthpawAutoworks Thanks for looking into it, and keep up the good work, some of the best transmission content I've seen!

[@MorganOliff]

I found this video because I was searching for why my transmission is stuck in first gear. When you drive and get to where 2nd gear would normally be it makes a shift but there is drag and the truck slows down. But if you manually put it in 1st gear it runs 1st gear by itself just fine. Just trying to figure out what that might be.

[@basicdetail4512]

Wow what a nice channel bro thanks

[@SouthpawAutoworks]

Glad you like it

[@efijemuehphilip542]

Thank you sir for your good works.Having watch this video on clutch and band application.I have an automatic transmission that is clutch and band type but it three speed aisin 172a automatic transmission.The problem it has is that it won't move when put in any gear unless the gas pedal is floored and it will move sluggishly just like a burnt clutch in manual transmission..The engine revs high but the transmission moves slowly.I have opened it,and discovered that all the clutches are ok but one seal(Teflon) at the output shaft was broken so I changed it and also changed the valve body but the transmission still behave the same.Sir, please what else should I do for it to be ok.Thanks for any response

[@karlfrench8736]

Hi Robert, I've recently subscribed and watched several of your videos. Thank you! You are a great teacher. I appreciate how you cover function and share graphics to make it understandable. I would like to ask a question or two about the 4L-60E. I have a '94 Fleetwood that has a transmission in it from a later model 4L-60E (I think from a '96 model). First question: how will the transmission work with a PWM solenoid in it when the original model did not have the PWM solenoid? Is the wiring such that the PWM solenoid would not even function? After experiencing some weird behavior after the converter locks up, I've been trying to understand potential causes... which is when I learned about having a later year transmission. The car feels like it's missing, sometimes jerking or bucking a little; but it's not losing power or speed (doesn't feel like it's slipping). This sensation only happens when it locks up. I'm wondering if this is a TCC solenoid, PWM solenoid or other issue that is going bad. Any suggestions/thoughts would be much appreciated... thanks.

[@SouthpawAutoworks]

Great question. 93-94 4L60E uses an ON/OFF style TCC (Torque Converter Clutch). The TCC is turned ON, and OFF, quickly...just like the other clutches in the transmission. When the TCC is applied, it almost feels like another transmission up-shift (slight bump). 95-up 4L60E utilize a PWM style TCC. PWM: Pulse-Width Modulated. PWM TCC are applied incrementally. With the PWM, you don't feel the TCC being applied. ON/OFF Torque converters use a clutch with a paper lining friction material.....just like the clutches inside of the 4L60E. However, PWM torque converters use a carbon lining. You asked about the electrical... It is also different. The solenoids, and the valve-body itself. The problem: The PCM (4L60E computer) thinks it's working with a paper-lined TCC. However, it's now working with a carbon-lined TCC. The carbon-lined TCC is designed to be gradually pulsed on. But, it's now being turned on instantly.

[@karlfrench8736]

@@SouthpawAutoworks , Robert, thank you for replying back so quickly. You hit on one of my questions. Assuming I have a PWM containing 4L60E transmission in the car now, what, if anything, does the PCM do? I would assume nothing. Do the wire connections that come from the PWM solenoid go to ‘nothing’ in the harness? By the way, I’m not sure what kind of torque converter is in the car. I don’t think it is factory (different color paint). Assuming the PWM circuit is inactive, is there anything else that could be causing the sensation of slight bucking after the converter locks up? Could this be the TCC solenoid going bad? I’m not sure if it can intermittently switch on/off/on very quickly after lock up. I wonder about the wiring harness too (if that could be bad; intermittent grounding). If the harness is bad, can you buy a harness for a 93-94 without the PWM connector? Thanks again for helping me think about this before going further.

[@SouthpawAutoworks]

The PCM controls when the trans shifts, and it controls the "feel" of the shift...how soft or firm the shift is. 1st to 2nd gear...2nd to 3rd...3rd to 4th...4th to 3rd...etc. And of course, the PCM controls the TCC operation. Early 4L60E's applied the TCC quickly. Later 4L60E's applied the clutch slowly. Because of this, there are different clutch materials used for the TCC. I would imagine that the bucking is because of the TCC friction lining. That lining is designed for gradual application...and it's now is getting applied rapidly. PWM style vs On/Off style.

[@karlfrench8736]

@@SouthpawAutoworks , my thanks again for replying and engaging. Even though I'm not sure of the torque converter that is with this transmission, I would guess that it is the correct type for use with PWM (friction lining). This may not be correct. Do you have any comments on whether the harness or TCC solenoid itself could be part of the problem, or do you think that's the wrong direction to investigate?

[@BrentA-e1c]

Awesome video. I have Hummer H3 with this trans. Rebuilt at 165K about 2.5 yrs ago. 2 weeks ago while in reverse unit will at times lock up as in stops moving in reverse. Push shifter into neutral and feels like still engaged in forward giving a little gas unit feels like lurching forward. Go to park and back to reverse sometimes it backs normally and others I have to shift to neutral, then to park, then to reverse and seems ok. Ish. Leary of taking it back to original shop. I'm thinking valve body issue, dropping pressure to reverse clutches. Temp not a factor as same hot or cold. Fluid at correct level and clean. Any thoughts you may have would be greatly appreciated. Thanks Brent

[@ThomasJBurke]

Robert Question, On a 2009 Silverado will the TCM mess with the 3rd gear not working the way it should?

[@cryothunder328]

Do you think you could give me a short explanation of what the overrun clutches do when in manual shift. I just don't understand what there purpose is?

[@SouthpawAutoworks]

It's hard for me to give a short explanation...but, I'll do my best. The Input Sprag enables engine power to enter the planetary gear set...but, as soon as we let off of the gas, and the vehicle starts to coast, and the Input Sprag "disconnects" from the planetary gear set (rotates freely, in the other direction) (known as free-wheeling). The Input Sprag acts just like a Craftsman 3/8 Ratchet...or any other brand. It locks when driven one direction, and unlocks/ratchets/free-wheels in the other direction. The Overrun Clutch prevents the Input Sprag from free-wheeling...which gives the vehicle engine-braking. I have not watched any of these videos, in a long time. Thinking I covered the Overrun Clutches in the video below. Note: I sometimes call the Overrun Clutches "Coast" Clutches. Not technically correct...but, hey. 4L60E Power Flow - Manual 1st, Manual 2nd, & Manual 3rd kzbin.info/www/bejne/bJzJcqiOf6uMfKc

[@cenick7254]

Hi , May I have some information about one-way clutch ? Thank You very much.

[@SouthpawAutoworks]

We plan on covering one-way clutches in a future video. Stay tuned! Thank you for your interest.

[@evelynperez7576]

gracias amigo

[@SouthpawAutoworks]

You're welcome.

[@abelmartinez1428]

How can I get in touch with this person?

[@SouthpawAutoworks]

I read every KZbin comment. I respond to as many comments as I can...time permitting.

[@kennynvake4hve584]

Maybe here I can get a long time question answered...Should I change my trany oil..I have a Chevy S10, year 2000, 4 cyl, with 240,000 miles on it...I have no idea of the history, just the oil is VERY brown, but to me dont smell burnt...Change it or not?

[@judelingam6100]

Great sir

[@SouthpawAutoworks]

Thanks for checking it out!

[@williammurray8060]

Nice video, I have a question. I've got a 93 2.5 4cyl s-10 2wd with 4L60E. When I start it cold it lunges forward a little bit???

[@SouthpawAutoworks]

When it lunges forward, do the engine RPMs drop, momentarily? Does the engine stall? Or act like it might stall?

[@randy1ization]

excellent presentation!!!! I just took apart a 95 4l60e ONLY the low/reverse cluthes are burned,, why would this be? thanks

[@SouthpawAutoworks]

There are a number of reasons that they can fail. A common wear item is the Boost Valve. It's used to elevate line pressure (oil pressure used to apply the clutch packs). When the Boost Valve wears out, it can wipe out the Low-Reverse Clutches.

[@randy1ization]

when line pressure is insufficent , that affects AFL pressure I think, (the activation pressure.. ), is the low reverse clutch pack the first to starve for fluid being its the furthest away from the pump? thanks

[@SouthpawAutoworks]

Low Line Pressure affects everything, including AFL pressure. There are several different oil pressures, all with their own jobs. But, Line Pressure is king of the mountain. If there's a problem there, it affects everything down-hill/down-stream. Don't know if you've already watched this video... 4L60E: AFL Valve (Part 1) How it Works: kzbin.info/www/bejne/gqKlnJebnLWdhM0 Clutches can fail for a number of reasons. However, the most common is a loss of (or inadequate) oil pressure. With the trans shifted into Reverse, Line Pressure jumps up a bunch....or at least it should. Even if the pump is capable of building enough pressure, the independent oil circuits that feed the clutches (clutch pistons) must not have any oil leaks.

[@randy1ization]

@@SouthpawAutoworks I see,, thanks !! so now I can look for a reason that the low/reverse pressure circuit likely lost its pressure. I will look at some hydraulic circuits and see if I can find some clues.. transmissions are fascinating for sure.. if the information thats out there today, would have been available 25 years ago, I likely would have went into the transmission repair and rebuilding field.

[@SouthpawAutoworks]

When time permits, I plan on dedicating videos to each of the oil circuits for each gear. Gonna cover basic operation of a healthy system. Then cover all common problem areas, too...with solutions, of course.

[@efijemuehphilip542]

Hi, thanks.My Suzuki aisin A174 auto tranny would hold down on it break on itself while am accelerating and immediately start running smoothly.It would brake,then run ,brake then run on it own.With what I have learnt from your video,I want to believe that it is the forward clutches that is engaging and disengaging.Am I right? Thanks for your reply

[@SouthpawAutoworks]

I am not familiar with the Suzuki A174. I am looking at some reference material on that trans, right now. However, there's not a lot to go off of, other than a layout of the internal guts. They're referring to their clutches as C1,C2, and BOB2. It's not uncommon for different manufacturers to use different names for the "Forward" Clutch. How many speeds is this transmission? When you say, "auto tranny would hold down on it break on itself while am accelerating and immediately start running smoothly." Does it feel like the brakes are being put on, while you are driving?

[@TBusaMike]

Rob...GREAT VIDEO !!!!!... I just went through an '08 4l65e and everything works exactly the way you described in the video. However, when it shifts to 4th it feels as if the brakes are being applied. I looked through it again and found the band smoked and the drum surface shiny and bluing as if not applying enough or either something else applied when not suppose to be...Any ideas ?

[@SouthpawAutoworks]

Great question, Mike! When time permits, I'll make a video about this specific issue. For the time-being, I've expressed some thoughts below. If you want to help this KZbin channel grow, check out this video: kzbin.info/www/bejne/nZq5aayJfpZ2sJo (Thanks for your support!) A few thoughts come to mind... 1). A seized Input Sprag. 2). A broken Forward Clutch piston (Cross-leak). 3). Cross-leak somewhere in the trans (Overrun clutch circuit being fed oil, when it's not supposed to be). Seized Sprag: The sprag must rotate one direction, and hold (or not rotate) in the other direction. It must also be installed, into the 4L60E, in the correct orientation. It's very easy to install it backwards (rebuilding mistake)....which is not the issue at hand. I'm leaning towards a sprag failure, as opposed to a rebuilding mistake. A sprag can fail in one of two (2) ways: 1). Rotate both directions. [Results in no forward gears] 2). Hold (prevent rotation) in both directions (referred to as a siezed sprag). [Results in binding (feels like the brakes are being applied) in the 4th gear] A broken Forward Clutch Piston: It's possible for the Forward clutch piston to crack, and leak apply pressure (oil) into the overrun clutch piston. When the Overrun Clutch is activated (turned on) the Input Sprag is no longer able to freewheel. In other words, it holds in both directions. Under certain driving conditions, this is desirable. However, the overrun clutch should never be on in 4th gear. When the overrun clutch is applied in 4th gear, it prevents the sprag from rotating (just like a siezed sprag). [Results in binding (feels like the brakes are being applied) in the 4th gear] If in doubt, you could replace it. 4L60E Molded Piston Kit: amzn.to/3CRVECB (Paid Link) Cross-Leak: I'd start with the sprag and the piston. If you can't find anything there, then it would be time to look for cross-leaks elsewhere. If it were me, I'd be looking at the Input Sprag. I'd also be looking closely at the Forward Clutch Piston (crack). ****Parts**** (Paid links) 2-4 Band: amzn.to/3CUSspR Input Reverse Drum: amzn.to/3g8v9PI (Caution: Some have a built-in check ball, some don't. Inspect your drum. Make sure you order the correct one.) Input Sprag: amzn.to/3CRXEL7 (Best to spring for a good one. When these fail, you can lose all forward gears.) If you want to gain a better understanding of what's going on, here's some more info...... A good place to start is with the 4L60E Clutch and Band application chart (Video time-stamp: 18:35). Clutch components that are used to create 4th gear are: 1). Forward clutch*. [I'll get to the star (*) in a minute.] 2). 3-4 Clutch. 3). 2-4 band. I'm not sure if you previously watched the video about 4L60E planetary gear sets (kzbin.info/www/bejne/h5u3YXaLfJxmj68). Per the video, there are three (3) members of each planetary gear set; sun gear, planet carrier, and the ring gear. In order to achieve a forward/reverse gear, one member must be rotated by the engine and one member must be held (or prevented from rotating). Direct drive is an exception to this rule (two members are simultaneously rotated by the engine). If this short explanation is not making sense, please check out the video about the gear sets (kzbin.info/www/bejne/h5u3YXaLfJxmj68). In 4th gear, for the 4L60E, the 3-4 clutch transfers engine rotation to the planetary gear set (it makes the rear planet carrier rotate). The 2-4 band prevents the reaction sun gear (the rear sun gear) from rotating. This creates a gear ratio of roughly 0.75:1 (Common gear ratio for overdrive, in any transmission). These are the only two (2) clutches that are needed to create 4th gear. So, why in the world are the Forward clutches still on??? Wouldn't this extra clutch cause the gear set to bind up? Absolutely!....but.... Even though the Forward clutches are technically on, they are not doing anything. In 4th gear, the input sprag freewheels, disconnecting the forward clutch from the planetary gear set. GM did this on purpose, for upshifting/down-shifting strategy. More on that, another time. DISCLOSURE: 🕵 As an Amazon Associate I earn from qualifying purchases. Some, if not all, of the links contained in this video description/comment are affiliate links. This means that, at no additional cost to you, I will receive a small commission on any purchases you make through the website links provided above.

[@GavinSwalley]

Hey I’m having issue with a rebuild. And. Has a code p0741