Unraveling The Dark Secrets Of The Automatic Transmission - A Dying Trade That You Should Know

Into the guts of an automatic transmission is a place many mechanics fear to tread. And it makes sense, given how difficult and inaccessible they are compared to the infinitely more convenient engine compartment.
But with fewer and fewer transmission shops and specialists around these days, digging in and understanding how they work is an important skill to develop for the home car builder.
RACING TRANSMISSION EXPLOSIONS. THE WHY WHAT HOW OF 727 CATASTROPHIC FALURES: • RACING TRANSMISSION EX...
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[@jeffreystroman2811]

Years ago, while putting a shift kit in a th350 I missed that the paint was all worn off two springs of equal size. Knowing the possibility they had different rates I took my valve body in a shoebox to our local transmission guru, in delco it's a place called Pat's. The guy was impressed that I had the courage to do a shift kit myself and he flat filed and assembled the box of parts so fast I almost missed it. I remember having to leave 20 bucks on his workbench as he refused to take any money. I said please buy yourself lunch, you just saved my project and daily driver

[@rickmaynard1419]

I taught transmissions at a community college for over 20 years. I loved seeing the look on the students faces when all this started to make sense.

[@kelvinrf]

Thanks for mentioning Precision Transmissions. It still amazes me the cross over in content that we all watch. 🤣

[@alxf66]

Richard at Precision Transmission is a national treasure.

[@larrykittell726]

In 1978 I had a 72 Fury Copcar and the tailshaft broke at the governor hole at 120 MPH. The drive shaft dropped down, bent in half, tore the gas tank then shredded the left rear tire on its way out of the car. I didn't die and managed to piece it back together with the back half of a small block 727. Not bad for a broke 17-year-old.

[@Riverdeepnwide]

👍🏻 Glad you made it to 61 Larry! I enjoyed my Plymouth police packs so much then traded the last one in on a K-car. Saved so much on gas it paid for the K! Raised four children through those cars.

[@robodrop2392]

The driveshaft broke first taking out the transmission

[@AlejandroRamirez-vl8mr]

You unlocked a distant memory. As a young 12yo with my first car, I once walked into a transmission shop. Place was like a hospital, clean, smelling of chemical cleaner, guys working with white robes and spotless. And transmissions dissected on top of an operating table.

[@alpha13dylan]

@P Kudsk some of us break down during winter and need stuff fixed in January when it's -20 outside. If you are a mechanic during winter you should know its part of the job. By all means though, power wash the thing in a heated bay before working on my car. However, i cant garantee that my stuff is gonna be spotless when its -20 outside. Just saying. So i guess you could always refuse icy cars in winter. Im glad for you if you have that luxury. Im sure i wouldn't have that luxury.

[@michaelgarrow3239]

@P Kudsk -Ok you’re that guy… 👽

[@alpha13dylan]

@@michaelgarrow3239 what do you mean im that guy? I cant control when my car breaks down. I dont have a heated garage to let all the ice thaw off of it before hand. Haha its not like i enjoy bringing my vehicle in for service in the first place. I will typically do the work myself if i can. I dont trust others to fix my vehicle. Damn near every mechanic i have had the pleasure of dealing with fixed the original problem but caused another. Or fixed problems that I didnt ask to have fixed because i was going to do it myself. I brought a car in for a mechanical fuel pump, and ended up with a new battery, new brakes and a new serpentine belt and then my dual tank fuel system was hacked up and didnt work anymore. Needless to say i never went back and I didnt pay for any of the labor because i hadnt requested anything else be done. Especially since belts and battery and brakes have nothing to do with the fuel pump.

[@kelsycunningham8452]

@P Kudsk 5 minutes of cleaning a day, totals 16+ hours of cleanup a year. Working smart is what the previous guy didn't understand.

[@michaelgarrow3239]

@P Kudsk - I’m more concerned about you getting a guy fired because he didn’t feel like cleaning his spot. And your attitude: which, to put it politely, is as little condescending. 🥱

[@AZOffRoadster]

When I was a kid I put a TransGo shift kit in my 727 on my gravel driveway. I dropped one of the check balls into the gravel. My heart sank. Luckily I was able to find it (in the dark). After I installed that kit, I had to start chaining the engine down to the k member. Every time I got on it I would break an engine mount when it shifted. I hate working on automatic transmissions. The fluid crawls up your arms like an alien slime monster.

[@throttlebottle5906]

one drop of fluid multiplies into many drops equaling a gallon of coverage. 😆 like "gizmo, wetted with water"

[@DoItMyselfGarage]

I rebuilt my TH400 last year. This was the first time working on any transmission. There is so much great information out there if you sort through it all. This was one of the items on my rebuild that I considered having done elsewhere. I've had zero problems with mine and am so happy that I took the dive into trying it myself.

[@WhiteTrashMotorsports]

I'm not a trans guy either, but I'm a cheapskate and will learn to fix anything.

[@dirtyburd71]

"Automatic Transmission" is another wonderful KZbin channel. Hiram is fun to watch and it's like hanging out at your friend's shop. Very real guy like Tony here. When I rebuilt my TH350 (for my mazda B2200 350 swap), he was my guide. Transgo shift kit was also part of the deal. A year and a half later, around town driving and some long distance interstate travel, it hasn't missed a beat! Tony and Hiram are top of the heap!!! BTW, Ratrod Bob is awesome too!!!!! ;)

[@richardlewis4288]

Hiram has a great site.

[@lilmike2710]

Rat Rod Bob went through and rebuilt his Chevy transmission like it was nothing. He was yanking parts off and just tossing it all in boxes like he had it all memorized. Popped it all back together just as easily. An amazing thing to behold.

[@jimmy_olds]

I just discovered Rat Rod Bob, that guy is unbelievable! I’ve binge watching his stuff like crazy

[@lilmike2710]

@@jimmy_olds right? The ol boy builds some of the sickest rat rods that I've ever seen.

[@jimmy_olds]

@@lilmike2710 the spider webbing he did on the one rat rod was ridiculous!

[@thejeepdoctor]

That’s how I did it too. Just make a pile of the parts. Other tech’s would ask how I could do that?????

[@lilmike2710]

@@jimmy_olds Charlotte 🕷️

[@pauljohanson7643]

I was a mechanic in my small home town, and there was no transmission shop, so most shops in town rebuilt transmissions in house when they needed to. I worked at a small independent repair shop. So I have rebuilt Borg Warner, Ford, Jatco, GM, and Chrysler transmissions built from the 60's up to the front wheel drive ones of the mid 90's, and I kind of enjoy them. I remember that if a customer came in when I had the transmission completely torn apart on the bench to see when it would be done, their eyes would get a bit big. I would tell them to come back the next day, and when they came in to pay, they never complained about the bill.

[@340duster8]

There is just old videos from precision transmission. Richard was really good to explain during the autopsy of the transmission and would also give pointers on how to keep from having certain failures in the transmission. Trent got his bloomers in a wad which I think was from Trent's new wife and him and his dad had a falling out. The channel was changed for a short time. I hope Richard either takes over the KZbin channel or Trent wise up and make peace with his dad.

[@Russeljfinch]

Funny how Trent thought he was the star 😂

[@340duster8]

@@Russeljfinch I agree. Trent was like reading from a script and boring. Richard was freestyling and was not lost for words. Pretty much anyone can pull a trans or do a filter change. Not many can do a autopsy on a transmission and know what they are looking at. When it is Trent doing a video I skip it.

[@burgegerm7878]

I used to watch the channel occasionally, noticed they haven't uploaded anything new for a while now. I couldn't find an explanation anywhere as to what happened. Didn't think it was due to Trent having issues with his father.

[@340duster8]

@@burgegerm7878 yeah I do not know the details but with the 2 video's Trent put out, Trent got butt hurt.

[@jesperboyd2120]

Disappointing about Richard and Trent. Are any of you following Southpaw Autoworks? I like it even better then Precision.

[@djlabs1975]

As a man who grew up in a blue collar family and now spend all of my time working in tech at an office, it's so comforting and cleansing to have UTG on in the background while I push 0s and 1s around. Thank you for this content!

[@lau12342]

Always check your sprag rotation before assembling 😀

[@thisisyourcaptainspeaking2259]

Also during disassembly! Don't get it backwards! ;)

[@stevefaltis8989]

I started and owned a transmission shop from 81 to 2003. We only did transmissions. Auto repair guys looked at trans as voodoo. I rebuild hundreds of trns in those twenty some odd years. They were always simpler than motors, although I built motors for myself. I won!

[@Texasmule]

I love rebuilding old school transmissions,they're easy to me and I love reviving peoples transmission and watch thier face go from sad to happy.

[@tarstarkusz]

I don't know how well this applies to transmissions, but I have found that understanding a single part of the circuit one at a time makes understanding a system far easier than trying to understand an entire system all at once.

[@haro997]

I took auto transmission in college and I never got such a good explanation. Thanks man keep it coming.

[@nickstephens2913]

Sadly I think Richard at precision transmissions just recently retired. Then another sad thing is John at crt was so overwhelmed building transmissions he just recently stopped building

[@nicholasagnew2792]

This reminds me of when I was 18 and knew nothing of engines. Very interesting. Honestly it just makes me appreciate a manual transmission. Big stick move gears

[@luiscanales9458]

I Always follow Richard’s instructions at Precision Transmissions when servicing my transmissions. Good,honest and professional guy.

[@TD_YT066]

Having the '66 Ford shop manual is what made it possible for me to rebuild a Ford C4 at home during a college break. That manual explained how everything worked and gave a step by step teardown and rebuild. Listed all the must-replace parts, plus it needed a torque converter and the front pump gear. Used two shop benches covered with old bedsheets , as parts came off, picked it up, moved it over a foot and continued until the last part was at the far end of the bench. I also put in a shift kit, which was a couple of replacement springs, a valve spool and a template to drill a hole in the plate. The manual stressed cleanliness, I went through a lot of paper towed and solvent reassembling it. But it worked fine.

[@richwilson8658]

im going to do my first 727 ever

[@rayowens4355]

I just rebuilt my 46re in my pickup. 1st time doing this myself. The 46re is essentially a 727 with overdrive. It took more time to clean everything than everything else. A service manual is a must! However I discovered a major mistake in the manual I have and apparently is in several others relating to the overdrive unit. There is a selective spacer that fits into the overdrive piston and the book instructs you to take one measurement and then select the correct spacer per a chart. The problem is the piston and spacer controls two different clutch packs simultaneously. Releasing the direct clutches and applying the overdrive. The book doesn't address the dimension to the overdrive clutches. Found a video by I think precision transmission (I think) and figured it out. Glad I did!

[@kefsn1374]

The spacer is for the overdrive direct. The directs are the front clutch behind the pump. The overdrive clearance is obtained by steel / pressure plate combos. Not anything to do with the piston. You're wrong kernel sanders! The bbbbook was right! Tip : if it worked before, put back the stack that was in it. Proof positive.😜

[@WorldPowerLabs]

There was an old transmission guy near where I used to live. He was closed most of the day, worked all night. It was always nice to see something happening when I was on one of my late-night walks.

[@madmanmapper]

I'm a transmission guy. Honestly? Business has really picked back up. It was fading for years, but I think the sharp rise in used car prices (and new car un-availability) has really made it cost-effective for ordinary car owners to pay for transmission rebuilds again. Because, as you say, they're so complicated now, they're expensive to repair.

[@DMR67442]

Hey Tony I have been subscribed to precision transmission for a long time. They have not put a video out in over three months. There was some type of falling out with the son of the father. I do agree though that guy was the best you could watch. Hopefully they fix up their thing and start posting again

[@speedy_pit_stop]

I saw my old employer taking them apart and back together countless times. But like you've said, the newer ones are crazy complicated and that's why I stay away from those things. I don't even want to own one, because I know it will fail eventually and will end-up costing a fortune to fix or replace.

[@danielscott6787]

Having been messing with Big block Mopars since the 80's you should have mentioned that on a 727 you should NOT manually shift it up from L-2-D ( Unless it's been modified to do so) that the Low/reverse band doesn't have time to "spool off"! Just stick it in Drive- with a properly adjusted kick down linkage- keep your foot in it. It WILL shift!!

[@mikedimaio1237]

So don't use the slap stick shifter?

[@electrolytics]

@@mikedimaio1237 That's exactly what I was thinking.

[@bullbutter9699]

I had a rear main seal leak, had to pull transmission, Well I thought might as well rebuild transmission. Been there , took two months and the purchase of some funky tools. Found out I could add a disk and use heavy duty pinions /planetary's (from a diesel truck) and use a oversized pan and cooler .My transmission will outlast humanity. lol .I had put valve body in upside down wouldn't shift manually, other than that pretty easy!! Its still going!! been 12yrs fluid clean as a whistle.IMHO heat kills transmissions. E4od Ford 300ci 337 k miles

[@spudtaterson6281]

I got a 94 f150 with that transmission and a 300. 394 thousand miles and its still on original engine and transmission never been rebuilt. She's a dog but I'm curious to how long it will last at this point.

[@hollowell427]

Did my first trans a th350 just a couple of weeks ago. Used the book "Turbo Hydra-matic 350 Handbook" by Ron Sessions. and watched videos from Performance Transmission. Works great, did his mods for Automatic/manual and the kick down delete and drilling the existing valvebody plate. Set up all the clearances like the book says and im rolling again in my 74 C10.

[@minnesotatomcat]

I was just about to comment as you started saying it but yes Richard at Precision Transmission is one of the best to learn from. He makes great videos and shows everything and explains it very well and knows all the little tricks. I’m addicted to his videos, glad u gave him a shout out 👍

[@wheelieking71]

Used to be. It appears Richard and Trent had a falling out. There hasn't been a new video in months. Not to take away from either of them, but: how many 48re teardowns can you do before people want to see an actual build video? I get the impression the plan was to make people pay to see the build videos. I believe they even started to implement that to some degree with subscriptions? That is when they lost me. Great channel still though.

[@wheels-n-tires1846]

Hot Tip: You DONT have to totally understand how it works in each gear etc in order to do a rebuild. Obviously it helps, but a careful disassembly and inspection, along with "the book", will get you through a rebuild. Don't panic when you see a $2500 reman Trans pricetag. If you can build an engine, you can likely build a trans!!!!

[@Videoswithsoarin]

very true, it cant seem daunting but if you have the right tools and carefully disassemble it youll be able to do whatever. easier with the book since it shows how it goes back together

[@jotallica898]

I work for a foreign auto manufacturing company in the US. I'm fixing these cars as they come off the assembly line. Most of our Transmissions are overly complicated beyond belief. Most of our Transmissions replaced the Starter, as in the Transmission is the Starter. That blew my mind when I found this out. Not to mention the High Voltage side of the Transmission and the parts related to it. These cars have a High Temp Coolant for the Engine and Heat, but they also have a separate Low Temp Coolant side for the High Voltage components that also run through the Transmission!?!? It really is unbelievable how complicated the Transmission is. It really makes me appreciate the C6 in my F100 haha. Thanks for this Uncle Tony! Cheers 🍻

[@drsnooz8112]

My nephew recently finished rebuilding his first transmission, a 4L80E. He did a beautiful job and it runs great, despite being badly beaten by the previous owner. While we were buttoning it up, he mentioned, "I was looking forward to this job so I would learn how an auto trans works, but now that I'm done, I still have no idea." I responded, "I felt the same way after my first trans, and even though I've done a few more since then, I still have no idea either!" LOL

[@TundeEszlari]

The video was impressive. 👍

[@shaggydogg630]

Uncle Tony , you nailed it when you said “ service manual”.

[@DoktorJeep]

I paid a guy to rebuild my transmission. He put the wrong size rings on the main piston so it only went in reverse. So I learned about transmissions and fixed it myself. I highly recommend the channel Deom's Workshop he does good teardown and rebuild videos.

[@johnnyhonda7576]

Thanks for recommending Precision Transmission chanel. I went to it for my AOD. He said if filter bolts are too tight the valve body will lock up so I’m going to double check mine before install

[@gusman412]

My 1rst trans was a 727 police intercepter factory installed in a '68 Road Runner. I was doing 115 MPH and decided to put the trans in neutral and coast. OOPPSS ! I hit reverse. Overhauled the trans but never cleanes the converter. After dropping the pan several times to replace the clogged filter a valuable lesson learned. After that I have repaired aprox. 100 auto trans until manufarures went Black box !

[@James7796ify]

Been watching precision for a while now that guy is the transmission wizard.

[@jorgefernandez-mv8hu]

Thanks for the explanation. They are complicated and precise. When they work right, they are fantastic. Good Luck to you.

[@jonmoore8995]

This was helpful. Have to start somewhere. This is a good birds eye start.

[@dominickserignese8837]

I used to work at a transmission shop in the mid to late '80s. That was the beginning of the overdrive GM Transmissions. I remember the rebuilders having a lot of trouble getting those Transmissions rebuilt correctly!

[@domenicscarfo1866]

I live in a big metropolitan area I went from 10 big trans shops with 3 to 5 people working there to 3 trans shop and only 1 is good. And he will charge from 3000 to 6000 dollars for a stock rebuild. So when my trans when bad I rebuild my self. Ran into a problem and was nice enough and helped me no problem. Thank you Lawrence Transmission.

[@billnlori3149]

Great video! We had to tear into a 727 in high school auto shop. Pretty intimidating!! But years later I rebuilt and modified a C6 myself. Figured even if I screwed it up a couple times, it was still cheaper than a trans shop lol!! Works great!

[@enduroboi6780]

Thanks for the explanation UT 👌

[@mikecollins8241]

An automatic transmission is a hydraulically controlled "computer", another way to see this ;)

[@charlesarata3801]

thank you Tony I started building at age 13 or 14 can't remember I'm 62 but there not as complex as you might think it's only a mystery till you dive in but thanks for the complement now it's software not shift kits.

[@jeffhutchins7048]

Anyone else who wanted to straighten Tony's glasses the entire time your watching this?

[@kevinmcguire3715]

I learned the hard way to always replace the rollers and springs in the overrunning clutch in the rear of the case. I just did seals 'clutch pack steels , and friction discs in my 69 340 cuda 727.It worked fine but the valve spring shims in the 340shredded because the inner dampers were much harder and the debri' all got sucked up and wasted the crank during a late night excursion. I was just freshening up the 727 while I had the engine out and it last only about 5000 miles before it started screwing up due to that rear clutch.

[@olegmorozov9053]

Very nice video and thank you for it. One thing I would mention is that basically every automatic transmission is build around a planetary gear set. And all these clutches and bands are basically needed to ether stop rotation or allow rotation of components of the planetary gear set, thus changing the gear ratio to allow the output shaft of the transmission to rotate either slower or faster in relation to the input shaft. In modern transmissions, to increase number of forward gears, manufacturers just basically add additional planetary gear sets into the transmission.

[@Mike-xt2ot]

I've never built transmissions for customers or profit. But I've built several Gm, ford and even a Honda for race cars and my own projects. It always amazes me how many engineers put inside a small trans case.

[@karlbishop7481]

We had a transmission guru in my town who had basically retired due to age and illness. Nobody after he quit. I had asked him if he could repair my 727 after I tried it due to the pressure rod not be seated correctly on the shaft at the trans. I had also told him I had a Direct Connection shift kit in it. He looked at the directions and just by looking he said that must have shifted hard. It did, it would bark the tires even on light acceration.

[@raiderjohnthemadbomber8666]

You're much more than a mechanic. You're an engineer, electrician, welder, body man, sheet metal mechanic, tuner, fabricator and critical thinker to name a few.

[@Hysteresis11]

Precision Transmission is an excellent channel.

[@alrui]

Thank for the link & info on Precision Trans, etc!

[@clutchkicker392ison5]

Mate , u said it all at 9:15 "there's no happiness ".

[@dennislaws5187]

I was a dealership mechanic for years. never touched auto trans except to change outright, early 200s I had a Dodge van with a 727, out of necesity I removed it bought a refresh pack, and clutches, and it worked great, bought the paperback manal at supply store and all went fine.

[@doctorwingnutmd2699]

Excellent job Uncle Tony very enjoyable and interesting video.

[@ZEPRATGERNODT]

My Armando of Armando’s Transmissions in San Bernardino has doing transmissions since a teen and is the Go To guy and fixes other transmissions from other shops too.

[@davidbastow9319]

Back before the invention of fire, I took a 2-spd Powerglide out of a '62 Chevy Impala. The service manual didn't tell me what I needed to know to disassemble it, but I got it apart and destroyed pieces trying. I bought a transmission from a junkyard and put it in, and now everytime I see a white '62 Impala at a car show, I mentally give it the finger.

[@jimmy_olds]

The son of Richard at Precision Transmission sadly nuked the channel a few months ago but it’s awesome…. Hopefully he keeps the videos up Maybe UTG could help Richard start a new channel lol

[@UnfinishedProjectDartSport]

What exactly do you mean that he “nuked” the channel?

[@jimmy_olds]

@@UnfinishedProjectDartSport there won’t be any more new content

[@jimmy_olds]

@UC8I3PO4ZsQiSvszuyxi5F2Q I’m not sure tbh. Reading through the comments of the last video uploaded, there was a lot of chatter about Richard and his son Trent having a falling out… I hope that’s not the case, life’s too d.mn short. Obviously take the comments with a grain of salt but either way, it doesn’t look like anymore new PT videos (at this time)

[@mrkultra1655]

Thanks Tony

[@tomgait7333]

Tony,I like you channel,love the shows and finally you are doing a 727 rebuild. Thank you,. I have been asking for you to do one. thanks again ,,,,,love them MOPARS....please keep up the good videos

[@wheelieking71]

The simplest description I have heard, and the one that made it all "click" in my head a long time ago goes like this: It is line pressure vs. shaft speed. They are always fighting each other. When one overcomes the other, something happens.

[@griffparker1466]

If anyone needs a good transmission shop in the Raleigh NC area, Messer Transmission will take care of ya. They just did a beautiful job on my Cruisomatic in my 66 ford Galaxie

[@stevelacker358]

Mystical transmission… it always seemed that way to me, until I took one apart. Truth is, the thing is INSANELY simple! The complicated thing is setting up the clearances, since they all interact and there are multiple ways to set them up that will all work (especially Torqueflites). Richard on the Precision Transmission channel talks about that a lot.

[@kefsn1374]

No sir. The complicated thing is knowing how to fix it and/or knowing where to start when things don't go as planned. Take it from a builder that learns everyday. Believe me when I say, they're not all the same, or built even close like it. 😜

[@rescuedandrestoredgarage]

My dad is a transmission guy I need to learn more from him. That will be my goal this year coming up. I will try and get some video of rebuilding a 727 for my 440.

[@pauberrymon5892]

Wow, we had to learn how to do every repair procedure from bumper to bumper, at NAVTS in WestNashville, including transmissions, differentials [ front & rear ], manual steering gear, & power steering pumps & gears, engines, brakes, ect. if it was on an automobile, we had to test, remove repair reinstall and re-test 1 of every thing.

[@Freedomquest08]

For some rigs, paying to have a transmission rebuilt is not an option. For example, my daily beater ZJ has a book value of probably about $1,100. Every local trans shop wanted $2,000 and up to rebuild the trans. A kit and converter and everything to do it myself was under $500. Did my journey go easy? Not at all. I've had it out 3 times sorting problems. It does work 90% now, but just not quite right yet. In the last vid Uncle Tony made I spotted what I missed, a O ring type seal in the clutch drum. I meticulously put everything back as I took it apart. Problem is if that part is missing during disassembly, chances are it'll be missed upon reassembly, which is what I now think I did with one seal in the clutch drum. Sometimes channels like Tony's are really helpful, because the transmission guy channels overlook a few things as an 'everyone knows that' item that us guys who don't work on these #$%# things daily don't know. It'll have to come out again I guess for that seal, but such is life when we can only afford the tuition to the college of real life experience. It appears we are devolving back to a depression era society where if we want to own anything and not eat bugs, then we had better start learning fast how to fix our own junk and how to feed ourselves.

[@Videoswithsoarin]

real facts in here. id rather pay $500 for another tool than $500 at the mechanics shop because then i can fix any car for only the price of the part. the way things are going seems like the only option. heres to hoping the parts come back in quality instead of getting worse

[@martinbaker3326]

Very true n very wise comment good luck with your daily 👍

[@dadalebreton184]

We use to put shift kit in our 727. (we as my familly had 5 Dodge Chargers with 440-727 and 1-440 six pack 4speed) With the instructions, it was not rocket science. It explained well with the carton sheet where to drill bigger passage and change springs with ball bearings in the valve body. I understood back then how complicated the hydrolics and valves body, cerveau, pistons, bands so i never really wanted to mess with that. Its thrue that it needs a good knowledge of the engineering of transmission to play with the dynamics of it. Tony sounds funny when he says; now they have, 5..6..8..10 speed with computers. If he thinks its complicated, i ear him 100%. Hahaha. Nice content and i get something out of it each time. Thanks to you. Even it its well explained, we still need to practice these skills cause it aint easy as it sounds. I need to fix my reverse on my Winibago 727. Good timing. Hehe!

[@robertb3409]

Great video, I have to brush up my knowledge on my wife's torqueflite in her 1958 Desoto

[@carebear2272]

My 68 charger has a HD 727 rebuilt, and all I know is he did everything, it was mind boggling when he tried to explain what he did, all I know is he had to do some machine work to put in some type of better thicker bearing thing in this is stronger then original and rebuild everything else, and gave me to give to restoration a bunch of directions on how to install with sharpie marks all over transmission 🤪

[@darwindodge6260]

Atsg Automatic transmission service group Makes excellent books for transmission repair Whenever I have to do a transmission I always buy there book for the trans and follow it from step one to step done

[@howlinhog]

In regard to the governor, I'd like to give my explanation of its operation with the use of a garden hose. Imagine you have a garden hose with a hole. Over the hole you have sealed the opening of a balloon. The water is on and it's just running out the end, this would represent you sitting there with the brakes applied engine running and in drive. Transmission oil is passing through the valve body into one of the holes Tony pointed out in the case, through the output shaft and on to the governor and just like the hose, transmission fluid is dumping out of the governor into the tail housing and back down into the pan. And just like the balloon would inflate with the back pressure from holding your thumb over the end of the hose, so does back pressure result in the governor circuit as you start driving down the road and centrifugal force causes the valve in the governor to move and block the trans fluid from escaping. But this time we're not blowing up a balloon, we're moving a shift valve in the valve body. As speed increases, so does pressure in the governor circuit and your next shift is accomplished. The throttle valve, you could say that the governor and it are having a battle with each other, governor wants to advance the shift, throttle valve wants to undo that by downshifting. That's a fairly simplified explanation. Even the simplest transmission in the car world (torqueflites) have fairly complicated valving that have to do with the timing of release and apply of clutches and bands.

[@erikstrawn3885]

I took a transmission repair class in college and we had a transmission dyno in the shop. Our instructor's opinion was that no modern transmission shop could function at a professional level without dynoing every transmission before installation. That was 25 years ago when the most common transmission was the 700R4. There were 12 of us in the class, and we each rebuilt a 700R4 and put it on the dyno. I think one transmission worked flawlessly the first time. It wasn't mine. A friend managed some transmission chain stores for a while about ten years ago. He had an incredible amount of trouble finding people who could properly diagnose and rebuild transmissions. The good techs didn't get paid well and turnover was high. It was obvious it was a doomed industry. Another friend was an engineer, working for a mass rebuilding operation, rebuilding Honda and Toyota transmissions. Even in an ISO9000 climate, they were getting a high number of failed rebuilds because the tolerances were so finicky.

[@jonnardjackson2884]

Transmission work is definitely a specialty! Computers have made them much more complicated in ways too!

[@petermontagnon4440]

Good one Uncle Tony!!!! I have done Power Glides 350s ,400s, but never a Chrysler tranny. Like you said they are all basically the same.Take care and stay safe!!

[@lb9gta307]

Where I went to trade school transmissions was an entire subject that we had to take each year as part of the automotive mechanics courses. You can't finish your schooling needed to write a C of Q test without it and we did have to pull apart and reassemble both a manual (in our case a Munci 4 speed) and automatic (TH400).

[@DanEBoyd]

Thank you Uncle Tony! My friend's transmission shop has somewhat morphed into a Land Rover specialty repair shop.

[@jonnardjackson2884]

I bet has a monumental amount of work!

[@DanEBoyd]

@@jonnardjackson2884 There's always tons of them in the lot when I go through there...

[@jonnardjackson2884]

We need not mention why! 😂

[@MrTheHillfolk]

@@DanEBoyd I can't find the story as I've looked for it ,but years ago my dad said he saw a story about a guy who won a new Land Rover for getting a golf hole in 1 or sinking a basketball from half court. They hand him the keys, he drives home and 45mins later it breaks and he has to call a tow truck 🤣 I'd bet your Rover buddy has heard that one.

[@hugechimp]

Tony you're a Rockstar. Once again I've laerned. TY

[@brianlevan339]

Thanks !

[@christopherportal7742]

Just rebuilt the 727 in my 1979 D150 a few weeks ago. Guy tried replacing the reverse band with one from a 518. Destroyed the rear drum lol. crazy. 727 was easy to go through and rebuild.

[@richardlewis4288]

I’m trying to learn about auto transmissions also. Somreall great channels. But the GM 4L60 seems to me to be the most straightforward one to understand.

[@ericwilson2585]

Yep, I couldn't agree more Tony.... The 727's, 904's, A518's, 46RH's, A500's, are in my opinion, the best transmissions in the world, and best thing that will "ever be" made.... Simplest in design, the least internal frictional drag, lightest in weight, and the most compact. And the ones that I mentioned previously, "NON COMPUTER-CONTROLLED!!!!"

[@georgekaplan6451]

An amazing piece of technology back in the day.

[@chilee6994]

Well now I know a lot more about transmissions than I used to.. which was absolutely nothing

[@rustybritches6747]

Gearboxvideo is another great channel for manual transmissions!

[@ronstandley1786]

A real good trans guy showed me how to use a long piece of bailing wire and as you disassemble put the wire thru each part as it comes out, as you reinstall you can't put the part in out of order or the wrong direction, bullet proof.

[@dh2360]

Cool transmission video.

[@noneed4me2n7]

I could sort out a manual easily enough back in the day but automatics were always a mystery. I get the principal but how anyone figured out how all those channels and tubes and hydraulic fluid work together, well I couldn’t ever make work in my head.

[@shoominati23]

Those new 10 speed Auto's are like those Babushka Dolls that keep splitting apart - Oh there's one drum - there 4 speeds in there, another 3 speeds in that one, 3 speeds in that last one.. dont forget the reverse LOL

[@johanjohansson3305]

Not looking forward to it but I'm gonna have to go into my 904 to do some fixing, it sometimes when I put it in park it shifts back and forth between park and reverse.

[@thejeepdoctor]

Look closely at the shifter lever that clamps to the range shaft at the left side of trans. They are prone to crack and will have just enough play in it, to not allow it to go into park. Still, inspect all external shifter linkage closely.

[@billythebake]

The 1966 FSM has an excellent section on Torqueflites, for MoPar fans. It was the first year after a re-design of the '62-5 design; had a lot of detail that they didn't go into as deeply on the subsequent years (the Honda automotive manuals always seemed to have the best description of any system the year it was first introduced... I expect GM and Ford may have done the same)

[@theredwedge9446]

I managed to make an automatic transmission in a video game called besiege, made a video on it ! Using little grabbers as clutches, routing the power ! Now its not close to real life but using clutches to reroute power to the sun gear and the planetary. Same concept and the process of making one helped me figure out how they worked. Little gifs and diagrams werent doing it for me.

[@lawrenceveinotte]

I have a friend who has lots of old auto trans he is just scraping, he would be happy for me to just go and pull them apart, i think i will, just for the hell of it,

[@etl-et5sc]

Yeah. 87 ram charger. 3.90's on 35's. Blew reverse gear. Definitely thinking NP 435 with all the extra parts I got laying now. 🤔😆

[@jasonkaiser5150]

I sucked water and mud into my transmission in my jeep off road. The vent for the transmission is behind the torque converter on top of the the pump housing. The book I got said to plug the hole and tap a hole in the tail shaft housing. Then use a hose barb hose to vent higher in the engine bay or in side the cab. Only drill and tap if the transmission is apart. Never had any more problems.