GM 6L80 E Transmission - No Forward - No Trouble Codes - Transmission Repair

[@robroy9793]

Hiram! The techs here at the Utah Transit Authority Special Services Division would like to thank you for your wonderful video. You described exactly the problem we was having with our coach. We tore down the valve body and found a stuck ball in our separator plate just like the one shown on your video. I am positive we will be using more of your 6L80E and 6L90E videos to work on our fleet of GM's.

[@blakessite]

Great video! I was a service manager for 24 years. You sir know your stuff. Technicians like you (that can diagnose problems instead of just guess) are in huge demand! Very impressed! Just a heads up. I've seen the supply tube crack Thanks again 👍

[@todosalud5952]

entiendo ingles poco, y sus explicaciones son unas de las mejores que he encontrado hasta ahora le felicito, muchas gracias, y Dios le bendiga.

[@AutomaticTransmission]

+josé mújíca Gracias.

[@blakessite]

Wow! Awesome information bro. You know your shit and have renewed my faith in technicians that can actually diagnose a vehicle rather then shotgun a repair. Great job!

[@devinbellis9898]

I'm a gm master certified tech and I must say you are definitely a well informed technician, I'm subscribed now and look forward to all videos

[@johnpifke9084]

I just fixed a 2010 Silverado with this information. Thank you for saving me a lot of time!

[@ashrafkappel6356]

John Pifke 3,4,5,gear slips what problem 6l80 2010

[@rakohus]

Hey John, my 2010 lost all forward and has reverse. Was this the same for you when replacing the check ball fixed it?

[@juicebox8549]

@@rakohus same. Did you fix the problem?

[@rakohus]

@@juicebox8549 YES. This totally fixed it and my transmission shifted better than ever after doing it. I did an entire writeup on what I did and you can find it by searching google for "6L80E - Reverse only, no forward sierra". Look for the user name Ralphis on a forum post at silveradosierra, should be one of the top results. Scroll down and you will see a start to finish explanation of how I did it. If you aren't experienced with messing with transmissions and sliding around on your back under a truck, be ready to set aside about 5-8 hours depending on the tools you have and ready to curse A LOT. All parts, which include the transmission fluid, it probably cost around $100. Multiple shops told me the transmission was totally shot and needed to be rebuilt/replaced for $3000-4000. You can pretty quickly do that math and decide if it's worth your time :)

[@adanestrada2728]

John Pifke I’m having the same problem what did u do

[@YTInnovativeSolution]

Hiram, I have a question about the 4T65e trans. Performing an air check at 20 PSI, the 2nd clutch pack activated only on the first try. Every other attempt it has failed and presented a cross bleed into the lube feed channel. I placed some more trans gel on the two split rings on the driven sprocket support and re-tested with success. There seems to be a slight leak at the split seals. Is this normal or to be expected or do I have a problem needing further investigation. All seals are new BTW. Thanks for uploading another great vid!!

[@NewBluu93]

I’m having this same issue on my 2010 camaro ss, the car goes into reverse and neutral but doesn’t go into drive!!! I’m hoping that I’m having the same issue thanks for your video and the information 🙌

[@jgrijalva1998]

2017 chevy suburban no codes and no forward or reverse can it also be check ball stuck ?. Oil looks clean ... noticed that when it was off for couple of hours and started it before it got warm it moved reverse and forward.. any insight

[@ToDaMn]

What parts would you order for overhauling the valve body and replacing the check balls

[@brandonkennedy4694]

The weld on the 3/5/R-1/2/3/4 drum cracks on these units also around 100k miles. I've seen it on the MYC and MYD (6L80, 6L90) units. It most of the time it gives a delayed reverse engagement or no reverse hot. I've also seen late and slippery 1-2 shifts from this. That drum is available loaded w/ pistons and fibers and steels from GM on the MYC (6L80) units but is only available bare for the MYC (6L90).

[@InquiringMindsKnow]

Help! My boyfriend had been borrowing my 2003 Ford Explorer Sport Trac, 6 cyl, and the next day I went to drive it and put it into gear, and it had no forward drives - only reverse. He will not tell me anything about what happened or how it had been driving. I was thinking it was in limp mode when he came home, although I have no way of telling. It has sit now for a year as I work from home and instead of fixing my truck, he purchased himself a car and we have been using that. I need my own wheels and want to get my truck going again. besides the typical things like fuel for getting a car going once it has sit for some time, I am wondering what should be the first things to do to get it going again. Can I get the old codes to show up if I can get it to start or are they gone since it has been without a battery for some time (he took the batter out for his car)? I just put a new battery in it. Hoping you can give me some ideas as to where I can steer a mechanic to start looking. Thanks in advance...

[@Arthur-xg8qu]

Hi Hirman to change the check ball do I have to take out the transmission?

[@jasonvivian9770]

if mine has issues the ball... if we replace it.. how much time did it take you?

[@gregsullivan7408]

Thanks - I'm in Australia with a Holden Caprice, and I have the same symptoms - will be interesting to see whether it's the same problem. Only has 122,000km on the clock. ☹️

[@jordanc.539]

I am working on a 2010 GMC Terrain 2.4L. It goes into reverse no problem, but no forward gear engagement. No engine codes either, would this possibly be worn out clutch packs?

[@AutomaticTransmission]

L/R molded pistón torn. I see that a lot on the 6T40's series and also on the ford's 6F30's series, which are very similar one from the other.

[@Joey-yc5ic]

Hi, as we were returning home from 350 mile trip with our 2010 Yukon XL our transmission locked up! I was approaching a stop sign in town and as I was braking the rear wheels locked up solid! We were only going about 5 miles an hour when it happen but it still through us forward rear wheels squealing. No codes, transmission temperature was @175 degrees, No reverse and when in drive no movement, it felt like the parking brake was on. Thank god we had neutral we costed to the curb. Now the truck is sitting at a dealership and I'm waiting for them to call me with the news. It almost felt like when I was in drive it wanted to go reverse? Any ideas what could have gone wrong? Thank you, Roy

[@gilliam355]

Can the check balls be the issue even if it don't get stuck in the plate

[@rangeday2923]

Great videos! Is there any way you can share that 6l80 manual?

[@World-Superbike]

Wow! I am Very impressed with your work. Do you ever work on a Hyundai transmission from a 2007 Elantra ( A4CF1 transmission ) I am trying to find where the 2 check balls that sit between the valve body and the top of the valve body (where the solenoids sit) should locate. Any ideas?

[@Diazlsx07]

Do you have any recommendations for study guides on passing the A2 test?

[@alejandroflores979]

How can I get those fluid schematics? I loose 1st as soon as it moves. Only works on Shifting down to Manual 1st, and manually shifting up from there.

[@DISELFORDON]

احمد محمد قبل 14 ساعة Thanks hiram

[@tattooguru179]

Can you access the check balls by removing the valve body? I will install chrysler check balls as preventative maintenance if its possible. Thanks for the awesome videos!

[@tattooguru179]

You are the best! Thank you

[@richlandis5601]

2007 Escalade. Every once in a while when going very slow under 7mph and go to hit the gas it goes into neutral for a second or 2 then goes back in to gear. Has a p0872 code. Do you think this is my problem? also after reinstalling the valve body do i have to take it to the dealer to have it put in learn mode?

[@dmorley100]

Awesome video!!! I'd love to see more videos like this one, using hydraulic oil schematics to aid in diagnosis. Also, I'd like to see an in depth tutorial on reading and interpreting hydraulic oil schematics, as well as how to use those schematics to identify what kind of fluid flows through which worm tracks on the case and valve body, that being line pressure, converter charge, EPC pressure, things of that nature and which holes on the spacer plate flow which fluid. I think you told me once before you were working on something like this with a Ford and a Nissan core that you bought for this purpose. If the Ford core you have happens to be a 4R75W/E then there's something you may possibly wanna know about it that could possibly trip up a video made on it, depending on what year the core is. If the core is 2001 or newer, the EPC circuit portion of the hydraulic schematics is NO LONGER accurate. Ford made numerous changes to the valve body in 2001, a couple of those being the EPC circuit is no longer connected to the 2-3 backout valve. The Shift Solenoid 2 hydraulic circuit is now connected to the 2-3 backout valve. Also, the Overdrive Servo Regulator Valve Boost Valve and Sleeve are now connected to the EPC circuit. As far as I know, Ford HAS NOT made updated hydraulic schematics to accommodate these and other hydraulic changes not mentioned here. If the core is 2000 or older, then everything should be fine. Sorry for the long post and have a good Memorial Day Hiram.

[@dmorley100]

No rush. I know you're a busy man. I've actually started doing this on my own on a 4R75 that I have torn down. It's either an 03 or 04, I'm not sure which. That's part of how I found out about the hydraulic changes I mentioned about the EPC circuit. I'd still like in-depth tutorials like I mentioned in my previous comment if for no other reason than to make sure my methods for reading and interpreting the schematics and worm tracks correct. The more I think about it though, the more I think there's a whole bunch of people who most likely need such in-depth tutorials. I'm not saying the other shop is bad or incompetent or anything like that, but from what I saw in it, the tear down video you did of the 4R100 with the no 2-3 up shift is a perfect example of this. If the shop who sent you that unit knew how to read hydraulic schematics and how to translate what is drawn in them to the live unit they happen to be working on, most likely they would have found what you found on that unit and fixed it themselves. Bottom line, watching that video, it looked to me like they needed a specific skill that they didn't have, and they and their customer paid for it both in time and money.

[@frankjude3420]

Thanks! great job with all your videos been out of the business for a few years with health issues videos are big help catching up!

[@angelramirez.7105]

cuando un carro choca a gran velocidad.. Se daña la transmisión?

[@todosalud5952]

MY FRIEND, SALUDOS, usted debería dar estas instrucciones en spain tambíen, usted dio una y muy buena, excelente, usted puede repetir está clase en spain??

[@AutomaticTransmission]

+josé mújíca Tengo otro canal que se llama Transmisión Automática. Es en español. No tengo muchos videos en el todavía pero dale un vistazo.

[@tradersnotion]

Thanks Hiram for sharing this video. Useful and interesting information. I have been using the "Torlon"(darker) check balls, as some call them, on some of the transmissions normally equipped with steel check balls to help with separator plate wear. They have been working well.

[@tradersnotion]

Where can someone find a flow chart for transmissions? Thanks

[@dadlesvostrosdecomer8786]

Hello Hiram, mucho gusto, I wanted to know when you are assembling valve body, what is the torque lbs that you set the torque wrench at. Thank you so much brother for your videos, they are of great help.

[@heavyhemi390]

i have a 2007 escalade 6l80E. when i start tje truck and pull it out of the garage to warm up it feels like the truck hicups.. when im accelerating from a stop light it shifts speradically into 2 & 3 kinda like if it rushes itself into the gears.... just bought it last week has 119k on it... what do u think?

[@ahbaghdoooohootojecislomeh7148]

Hi, can you advise? when I get listed on "D" it jumps up 1 gear. when I put "M" so the car starts. Other speeds also go to "D", but with little gas slipped. Gums in the gearbox are ok, solenoids (their resistance is ok) the car has reached 60,000mil. I gave a new oil. but with the air test, I do not move the basket for 1-2-3-4 only a few. can you please give advice?

[@weldean46]

6L80E / Honda , i see honda parts next to your 6L80E , nice video

[@brandonkennedy4694]

The 2nd piston on the 4T65 will have some blow by on the rings and air will come up through the center of the piston around the bushing area. Normal. stack up the clutch pack in the drum and install snap ring. Crank air up to 40psi and retest. I've never had much success air checking at 20psi. you can stack the 2nd drum on the input housing and into the driven sprocket support and air check the 4th piston, the 2nd piston, and the input and 3rd pistons all through the driven sprocket support.

[@jesusrangel5829]

Gracias x compartir la information del problema de la transmission 6L80 E muy buena la information. ..saludos.

[@kellypearson7944]

nice video . wished I had this 20 years ago I just got 1 questions can a 2000 4l 60e guts and kit fit in a 1995 both are. 4l60e the 95 is the 2 pice the 2000 is the remove bill hosting please I need to get my truck going done spent a lot of Money on the wrong 2000 and the tail piecewon't bolt up thanks for the learning 😉😃😍😙🤗

[@jHuff-dm7lz]

OK, It was moving but the pressure spike from the on/off pump surge moved the checkball which finally lodged into the spacer plate. I was looking for those type of hydraulic schematics? Chrysler checkball? Part Number? It seems that a lot of the diagnostic work just begins when the transmission is on the table. A lot can be done with a scanner but a lot, I'm beginning to think, can only be done by visual inspection. Thanks much Hiram.

[@jHuff-dm7lz]

Outstanding job brother, you are the master. Much respect.

[@tradersnotion]

You can buy the "Torlon" check balls from transmission warehouses and off of ebay. I am sure that other sources have them also. Finding a parts person that knows what they are or what they fit helps. I use them in HP applications with higher pressure.

[@jHuff-dm7lz]

Cool....................

[@timstanford3443]

did you replace spacer plate?

[@hugoberdeja9283]

Very clear explanation 👍

[@RC-Heli835]

Where do you get your hydraulic diagrams Amigo? That's awesome info! This would have been a night mare had the check ball not been stuck. I guess you would have noticed the small check ball though and would have assumed it was sticking?

[@realdeathpony]

Just lost my 6l80 in my 15 burb. Started to rpm fluctuate in 6th. Then lost all drive. Would this do it?

[@cesardeluna4560]

Brother thanks for your teaching

[@clifdmal]

Question. I had my transmission replaced with a used one and it was still slipping in 1st gear. I took it back and the guy rebuilt my transmission and says its still doing the same thing. Is there a step that he is missing?

[@gboo9490]

Hey Hiram im on rack scanning and wheels arnt moving in drive how ever with no output signal the solenoid one is turning off with only imput signal increases.Still looking into it.

[@JBURNJROLL1]

So the failure happened because the check ball was worn out and too small, causing it to stick in the hole, blocking fluid to the appropriate clutches? My boss has an 09 Yukon Denali, same thing, reverse but no forward gears. Dealership says it has a broken hard part inside the transmission, and has recommended a rebuild or replacement at 180k, but I think it is this same issue. Fluid looks ok, brown but not burned. No codes.

[@patrickwarden2933]

what are the Check Ball part numbers?

[@lostfound9346]

Great informative video I was wondering if there was a part number for the separator plate gasket

[@LastMechanicStanding]

Great video Hiram. Very valuable knowledge. Have you ever had to replace the separator plate due to the check balls? Also, does the pressure increase spikes help cause this problem and have you every seen pump damage because of it? Does the 6L90 have the same issues? Thanks, Tony

[@HatedWar]

my 01 Honda Odyssey does that when come to stop it stop shift i have to turn off engine wait 30 second -1 minute then start a gain then it go normal but once come to the stop again it does the same again i have to keep doing that turn off 30 second or one minute then start again then go normal so what u think it problem? any suggestion is appreciate it. there is no code showing.

[@timstanford3443]

cool, your approaching 100k! what are you going to do with your play button?

[@ahbaghdoooohootojecislomeh7148]

hello you advise? on D, my car won't move. the M starts off but the 1st, 2st, 3st at full throttle clutch slips. I changed the seal to 1,2,3,4. sealed to thcm, oil, filter. there are no wear parts in thcm. the pump seal is replaced. everything looks intact. the car has driven 60000mil. the stator rings are replaced. please help.6l50 camaro 2014 v6

[@stevegriffith7236]

What?, no updates with molded pistons?

[@emmymason804]

Where did you get the valvebody scmatic's

[@thuyito]

Can i put another transmission into my 09 denali. I am trying to put one from an escalade 10. Same 6l80 different yr

[@tuanbui634]

hello hiram i watch a lot of videos shared from you, they are very impressive. A great thing for those who are doing automotive technicians. let me ask where and how I can find materials like yours. thanks you

[@AutomaticTransmission]

This fluid diagram was printed from Mitchell on demand. You can probably also get it from Alldata.

[@icaldfer]

Hello Hiram, I recently found your channel and its impressive all the information and knowledge that you provide, I really appreciate it. I got a question, my 1998 sonoma 4 cylinder is not shifting from 3rd to 4th, I plan on rebuilding one, do you know if any 4l60e will work or does it have to be another 4 cylinder? Thanks

[@milesmaher2167]

I am getting code P2723 on 2011 silverado with 6l80e. Coulc this be the problem?

[@sethc758]

I have a 2012 gmc Sierra 5.3. 6l80. Drop it down in drive it goes into drive you move 5 feet it breaks away/neutralizes. Has reverse. But you can shift it manually with the toggle on the gear shifter and get it to pull. Any ideas? Had tehcm reprogrammed and everything same issue.

[@sethc758]

Found the fix. The one way sprag is gone. It's supposed to turn freely one direction. Mine sounded like a 1 inch drive ratchet. And a sprag in another 4L80 that I had apart, it was locked up completely. So if yours is breaking away in 1st gear the sprag is cooked.

[@joelopez7576]

labor on something like that if you don't mind me asking

[@jasonvivian9770]

Do you need to reprogram the trm/valve body?

[@stephenr1999]

I believe you should and clear the adapt tables.

[@willnjenna98]

Hiram, I am having a similar issue with my 2011 cadillac ctsv 6l90e transmission. I'm getting a intermittent neutral condition after you come to a stop when the car is hot. It will go into neutral, then back into drive, but when you press the throttle to go, it slowly creeps forward like its in 3rd gear, then "kicks" into 1st/2nd gear and drives just fine. Any ideas? Check balls? Trans has been rebuilt and just replaced valve body, etc. problem still happens.

[@justinfoster9560]

hey I have the same problem on my 2011 silverado. I have 104k miles. did you figure out what was wrong with it. I'd like just a possible diagnosis incase a shop trys to bend me over. how much did the repair cost

[@justinfoster9560]

hey I have the same problem on my 2011 silverado. I have 104k miles. did you figure out what was wrong with it. I'd like just a possible diagnosis incase a shop trys to bend me over. how much did the repair cost

[@justinfoster9560]

hey I have the same problem on my 2011 silverado. I have 104k miles. did you figure out what was wrong with it. I'd like just a possible diagnosis incase a shop trys to bend me over. how much did the repair cost

[@josueescalera207]

Did you ever figure out what the fix was for this?

[@thebaker7]

This is exactly what my 2010 silverado is doing. 6L80....

[@0x000a5]

Do you think the transmission can be reconfigured to only rely on the tps to determine when to turn off solenoid one rather than wheel movement? I mean, what if the owner of the truck puts rims on the car or larger tires? Some dodges had a problems with kick downs because of wheel sizes and wheel speed sensors and stuff,

[@0x000a5]

that makes a whole lot of sense

[@macdonald1790]

Excellent video

[@alainvalencia3383]

I'm having the same problem on a 2010 suburban with the 6l80e. I only have reverse gear. I pulled the valve body and check balls are in great shape. any help would be greatly appreciated. thnx!

[@johngarrett9727]

Any luck finding the issue?

[@alainv5836]

john garrett. no luck tried replacing check balls and checking solenoids. nor forward gears bur reverse works just fine

[@princemcree4031]

Alain Valencia any luck I have same problem

[@dthree7376]

Did u find out what it was

[@lawnmanlawnman8374]

Is it just me or is GM unable to just get their transmissions right? Good for business Hiram

[@Leekautorepair]

This symptom is the norm for me lol

[@mn4a15]

Awesome video well made bud

[@hilariogayossocruz5660]

tengo una 6l80e montada en silverado 2500 año 2010,se reparao la caja,le entro agua se cambiaron discos de acero y pastas en gral,se monto trabajo un rato y dejo de ahcer los cambios hacia adelante reversa trabaja bien,probaron desconectando el techm,y ahi si trabajan los cambios ,no hay codigos presentes,se conecta de nuevo el techm y vuelve la falla.........comentarios son bienvenidos

[@khaniftikhar9225]

Good information

[@AutomaticTransmission]

Thanks

[@louisedwards4023]

Every 6L is a rush at my shop $$😃

[@cezo8]

Mine has the same symptoms but my check balls where good. 1st gear in d moved like a foot then slips . I put it in manual and a scanner with no codes press erase and goes 1 manual then I put back on d and everything works for some reason on d the 1st gear won't work

[@cezo8]

replaced bcm don't need code reader to make it work . It when I put it in 1st it will move till like 1500 rpm then it slips but if I put it in manual it work fine. 2-6 work fine in m or d. Just 1 in d any suggestions maybe worn valve please help I'm lost

[@cezo8]

Checked all valves , tcm pressure switches . Everything is good . Any ideas

[@thebassmangary]

My car is displaying these symptoms but is intermittent. They're telling me it's the solenoid and I need to buy a new TCM to get the solenoid. I'm worried I'm gonna spend all that money and the problem will still be there

[@rakohus]

I know it's 7 months later, but I hope you didn't buy a TCM if you only needed solenoids. There are two solenoids that are identical and go for about 10 bucks each and there's one TCM that goes for about 500-600

[@emmaadchalabi7050]

Excellent thanks hiram

[@Almeshtages3]

THANKS HIRAM

[@992923]

GOOD VIDEO

[@happy543210]

so much trouble because of one little plastic ball! why can't they use metal ones?

[@tradersnotion]

The "Torlon" (darker) check balls seem to last much longer and are much easier on the separator plate and aluminum case or channel plate .

[@geojor]

thank you...

[@JD-526]

Ya what he said below..v..

[@emzetka250]

ANYBODY HAVE A PART NUMBER FOR THE CHECK BALLS ? THE GUYS AT THE DEALER HAVE NO IDEA WHAT IS GOING ON LOL

[@antonioaceves1485]

Pudieras poner en español

[@bobwolf3370]

Im not a huge fan of the 6L80 when it comes to work trucks.

[@williamhyland8384]

Wow I was screwed over by a check ball

[@louisedwards4023]

Well , kind of BUT it's a lot more than that !

[@johndonovan7018]

plastic check balls.. what the fuck?? ive pulled 2 boxes on my cars. always metal

[@todosalud5952]

Hiram hola, spain video.

[@WOODR52]

Poor quality , bad design/engineering,like your video, but most of us do not have the facilities to rblld GM's inferior junk. My 2008 HHR all of a sudden had no forward but had reverse. I could fix, but the car is the worst ever made besides Edsel. bought a toyota.. thanks-

[@luiszamorajr8163]

I need some help. I have a 2011 Chevrolet Suburban with the 6L80 and it is moving, but not changing gears normally unless you keep the rpms below 1500 and transmission is cold. Once truck is over 40 mph it changes gears ok, but once transmission is hot, the gears take even longer to change even with low rpms. What would causing this? Any info would great.

[@fastmoneywillinghan8424]

Did you fix ?

[@02arlandis]

2007 Escalade. Every once in a while when going very slow under 7mph and go to hit the gas it goes into neutral for a second or 2 then goes back in to gear. Has a p0872 code. Do you think this is my problem? also after reinstalling the valve body do i have to take it to the dealer to have it put in learn mode?

[@fastmoneywillinghan8424]

Did you fix ?

[@02arlandis]

@@fastmoneywillinghan8424 yes 6 years ago lol