THM-350 Transmission - Rebuild Part-1

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Turbo Hydramatic 350 Transmission.
This is Part-1 of a THM-350 on a Pontiac Trans Am.
This video covers the disassemble part of this unit covring what is the most common failures of it.
Part-2 will be, depending on the owner, probably a High Performance build.
So if you're not subscribed yet, please do so now.
Thanks for watching.

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23 янв 2016

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Комментарии : 626

@billygoat1708 3 года назад

I used to rebuild 2 of these a day back in the 70's. Haven't been a mechanic since 1980 but could still do one of these with my eyes closed. He did a very good job explaining the teardown. That was the easy part. Putting it back together is the trick. TH350 was a very good tranny. I had asked my boss (in the 70's) why he charged so much for a rebuild ($300) since there was only about $50 in parts. He said if it came back under warranty that he could rebuild it again and it didn't cost him anything. We never had a TH350 come back.

@mqbitsko25 5 лет назад

Mad respect to the guys who DESIGNED that thing. Amazing.

@seen203 5 лет назад

Yep. The artwork behind that level of engineering is just amazing.

@grizzlygrizzle 5 лет назад

The valve-body is designed to replace a shitload of tubes and valves that would otherwise form a cluster of hydraulic lines moving hydraulic fluid here and there in many different ways under different conditions. The "wormwood" patterns on the bottom of the case run in one pattern, and those on the valve-body itself run in a pattern that's generally crosswise to it, and the two are separated by a sheet of metal that separates the two halves, allowing selective connections through strategically located round holes. If you look closely at the valves themselves and the cylinders they pass through, you'll see that as they move, they open some passages while closing others. The valve-body is an amazing design, one so elegant that I suspect that the concept stemmed from a leap of an individual imagination. -- I believe it was in 1940 that Oldsmobile came out with the first cars with automatic transmissions.

@BAMAJiPS 8 лет назад

you get more done in 30 minutes than I do in a day or two it seems. I hope you are teaching these skills and work ethic to a new generation. love watching you work

@grizzlygrizzle 5 лет назад

In the 70s, the flat rate time for a complete rebuild was 10 hours, including removal and re-install. And waiting at the parts counter.

@andrewpayne6295 7 лет назад

My head is spinning with all the detail and all the parts! The experience that you must have to keep track of everything and the order of operations is mind boggling. This is one of the coolest things that I have ever seen.

@MrDelow11 6 лет назад

Andrew Payne I know I was the same way watching this😂😂😂

@souldoctor10 5 лет назад

I've always been impressed with those that can keep track of all the clutch plates and such. I couldn't do it.

@PhuckHue2 5 лет назад

nah its easier than you think. the key is not to lose anything

@arcnova1982 4 года назад

I take pictures and record what I'm doing because I tend to forget. But this is waaaaay beyond my knowledge lol

@sandalsinak6829 4 года назад

" I call it a mexican shift kit, I'm mexican, what the hell" LMAO that was hilarious!! Great video I was able to rebuild mine perfect because of your help. Thank you so much!

@jarkolimbo9268 5 лет назад

Aces! I love it when experts are REAL EXPERTS. I doubt I'll have the opportunity to rebuild a transmission myself, but it is good to know how it's done. THANKS!!!

@TheTexasCoder 8 лет назад

Hiram, I cannot thank you enough for posting these videos. You are a master at transmissions! Thank you again for bringing us along on these rebuilds! Keep the awesome videos coming!

@craigbonney7115 6 лет назад

I have a 1982 gmc sierra truck that has a thm350c 4speed overdrive transmission identification #4DH977713. It has 6 check balls in valve body. Where do they go?

@3melendr592 5 лет назад

I agree, Hiram is a master! Old school smart!

@davidr4332 5 лет назад

I have a turbo 350 behind my Chevy 350ci , i learn a lot just by watching this pull down . Now on to part two .

@mrmanitoba 3 года назад

Hey thanks Mr Auto Transmission. I rebuilt a 350 for my Chevelle with no previous experience and a year later she is still working!

@bryceharris6388 6 лет назад

I'm not even 5 minutes into the video, literally, and I'm already impressed with it. Good job mang.

@thelasttimeitried 8 лет назад

Most thoroughly explained teardown video I've ever seen. Very nicely done.

@nicparker3809 5 лет назад

Dude is a pro.. See him take out the snap rings? Takes me all day to get one out.....lol

@briannotafan3368 5 лет назад

leave out the wave plates and add a extra steel for that tire chirp 1 2 shift

@Hopeless_and_Forlorn 6 лет назад

Always a pleasure to watch an expert at work. In 1977 I bought a new Impala wagon for my growing family, and never had a problem with the tranny, which was surprising. When it came time to change the transmission fluid, I dropped the pan to replace the filter and found that several valve body bolts were loose, and two had backed out until they rested on the pan. Some real winners were assembling new transmissions in those days, I guess. I torqued the bolts and never had a problem.

@CheezyDee 8 лет назад

I did a performance rebuild on a smoked TH350 for a friend of mine, took the clutch pistons to work and shaved them down on the lathe to fit more clutches, except the intermediate, had to clamp that down on the Bridgeport. Add a B&M rebuild/shift kit and bolted to a lowly 305 in a Camaro and it was chirping second gear WOT in drive. That car gets wrecked, I wind up with the trans in my shed, I sell it to another friend and it goes in another Camaro behind a 383 and 2nd gear was leaving 100 feet of rubber. After 3 months the new owner "complains" about ripples in the roof due to the car twisting during hard WOT shifts. I told him to get subframe connectors or a roll cage. :P

@HighFive4Me 8 лет назад

I've said it before but Hiram you are a Master at your craft. I know absolutely nothing about transmissions but watch every second of your videos. You explain things and your knowledge is mesmerizing. More videos!

@dennisdurot9365 5 лет назад

This is awesome. I was a rebuilder back in the 80’s into the 90’s. I loved automatics. The scared the shit out of alot of guys. Like voodoo man. It was great watching this. Thank you.

@packingten 4 года назад

What types did u rebuild?.

@MySpace662 3 года назад

It's amazing, watching a surgeon specialized in transmissions.

@oafyvonskidmark316 5 лет назад

This video is full of knowledge, nobody is going to be able to disassemble a transmission so confidently zip zap using air tools and talking as he does it, no searching for sockets etc, he clearly has been doing this for years, I am an HVAC tech and I can see the magazine mechanics coming a mile away, this knowledge is priceless! Everybody should have a Dad or Uncle or Brother, Neighbor like this, you will spend a lifetime trying to learn what he can teach you in short order if the kid was smart! Great knowledge being passed on, that is a great service to everyone!

@nomjuice 8 лет назад

I love all your tranmision videos. You are so thorough. I originally found your channel looking for information on rebuilding a 4L60E and you even had information on upgrading the transmission and adding a shift kit, which was exactly what I needed. You are truly a master of your craft. Not enough people in the world take the time to be as awesome as you are. Keep jamming on the rebuilds.

@Speeddemon3 4 года назад

Hands down the most comprehensive TH tear down I've seen. Outstanding video, thanks for taking the time mate!

@aboutmyfathersbusiness8324 7 лет назад

Hello Hiram. I have a 1976 corvette. All I have done is change the pan and filter. Put a new flex lock dipstick. No surprise the trans has never been torn down. It stays in the garage most of its days. These 350 TH's are built pretty darn good.

@LesbianNaziHookers 5 лет назад

What an amazing piece of engineering. You can tell this dude knows what he's talking about backwards and forward.

@danielingraham9701 4 года назад

I bet if he was not talking through the video that he would be able to take this apart in 20 minutes or less. I am glad he talked because I was needing to learn . Also glad he has some energy in his voice which also helps for the viewer that wants to learn . I wonder if this guy teaches on the side. If not he probably would make an excellent teacher . He is definitely "Not Boring" and not fumbling around while doing his break down. Wish he was my neighbor, I would have fun helping out in his work shop .

@gitlittoo2161 5 лет назад

When i was a teen in the 80s. A old man that owned a junkyard taught me how to rebuld transmissions. From VWs to Dodge. He was realy good to me

@packingten 4 года назад

So how long you been a "Rebuld" Expert?.

@philipheid9487 5 лет назад

This was the best tear down I have watched most informative I am a retired licensed Aircraft mechanic restoring a 1977 corvette frame off resto

@Tony-112 5 лет назад

Just found your channel Your videos are very detailed and there's no mucking around , straight to the point 10/10

@yorickaname9475 7 лет назад

"Mexican shift kit"! lol I love it. You are an awesome instructor. Thank you for your time.

@bitgoblin8497 5 лет назад

Great video. Transmissions always amaze me with the amount of parts they have. Its like a magic show the parts keep coming out of nowhere !!

@ReMarkAbleMagic 6 лет назад

What a great teacher; makes one not so afraid to tackle projects many fear. Excellent video!

@robertgualtieri143 5 лет назад

Don't know how I got here, but I learned a little about transmissions. Very cool.

@srjacobs85 5 лет назад

I just came upon this video while on my lunchbreak....I just watched the whole things. Hiram should be a teacher; dude explains everything and makes it all easy to understand.

@gardner711 3 года назад

Completely rebuilt my 350 based on your two videos and this was my first rebuild. You rock.

@michaelrosenbauer6493 2 года назад

Thanks for showing. My TH 350 needs some refreshment and your Video gives me everthing I need! I realy appreciate this!

@johnbernardini9497 2 года назад

Thank You for showing this video, always fascinated on how automatic transmissions operate which is so cool.

@jesscneal 8 лет назад

I'll echo what everyone else is saying. Love your vids. Automatics have always been such a mystery and your explanations and step by step teardowns and builds are awesome. Thanks for sharing everything

@reverendrichard7056 Год назад

Thank you for this video. I have been a tech for 30 years. Just never got into transmissions. Now I'm trying to redo a 77 El Camino and of course the trans just stared slipping.

@dt3510 5 лет назад

Sir I'm not good at this. I took it apart and I had a vernier caliper to measure the depth of the bushings and the thickness of the plates. It took me 3 days because I have never done anything like this before. If a bolt came out of a hole it went back in the same hole. But you gave me the confidence to give it a shot. Can't thank you enough. And the DANG THING WORKS !

@koopa816mj1 3 года назад

Best automotive repair video I've ever seen. What I learned is I cant rebuild my th350. This takes a pro. Thanks sir!

@MagnusDominus1 5 лет назад

Automatic transmissions are voodoo. Manual transmission is easy to understand. This dude works magic.

@JeepITguy 7 лет назад

Thanks for doing these, man. You've helped me immensely on the 700R4 and 42RE, and now I have a buddy wanting my help in rebuilding his TH350.

@edwardthomas9273 8 лет назад

I appreciate your videos and I use them as informational videos and I was able to rebuild my first THM 350 and I have also done one 700R4 trans and the trans in my 02 super duty with the 7.3. The money I have saved myself and the learning I have gained is great. I've been working in the mechanic field for 16 yrs and now added trans to my specialty after going to automotive and diesel schooling.

@jamesprovenzano8679 6 лет назад

Hiram, Excellent demonstration of a complete disassemble. Clear and to the point, a person could watch your demonstration and rebuild this transmission. Please keep them coming!

@thomasnorthcastle4130 7 лет назад

You REALLY know your job!!! You also are extremely clear in your explanations of showing what you're doing. That by itself is greatly appreciated. As you said in your video, you absolutely make it look easy and effortless. Thank you for sharing your vast experience.

@nealelliott 6 лет назад

I admire your knowledge and skill when breaking down transmissions with ease. Thanks for posting these informative videos.

@512kjt 8 лет назад

Always in to watch, Hiram. Thanks for sharing. Looking forward to part 2!

@cockasorrus7475 5 лет назад

It is awesome to see a professional sharing their knowledge with the fellow citizens! You are very articulate in describing the subject and it seems from your comments that I'm not the only one noticing. Thank you very much!! I can't wait to watch the second part!

@kevinhook2214 5 лет назад

Hiram, that was awesome! You gave me a headache moving so fast through so many complicated things. Very cool!

@ddamrill 8 лет назад

Hiram thank you for your extremely informative videos!!! I picked up a 1979 TH350 for $50. It looked pretty rough but my buddy had it sitting in his shed for a couple years, he thought it was rebuilt. I followed your videos and pulled the pan and valve body. I thought it would be pretty bad because the dipstick was gone and water got in. At first glance I was sure this thing was trash ... watery sludge and the valve body gasket basically fell apart. I removed the pump and it still had the blue assembly lube present and all new clutch plates and gaskets. I removed the governor and it was also perfect. I think I'm going to order an overhaul gasket kit with new filter and see what happens. Thanks for all the information, you sir are THE MAN !!!!!

@22re53 4 года назад

AmaziNg vid! After watching I decided I will also give my mechanic a 12pack of some good beer with his price quote to rebuild. So many rings and thousands of parts omg! I sometimes can’t even remember to rabbit ears or loop and over and pull tight. Your left pinky has more brain than my head. Thank GOD for guys like you. Keep it up

@randyupladek1855 5 лет назад

Your knowledge is absolutely amazing!

@alonsomajikal3158 6 лет назад

you're an absolute legend! thanks for the video mate.

@laughingachilles 6 лет назад

This is one of the best shot videos of a rebuild on youtube, great stuff sir.

@davidtrevi2914 4 года назад

I like the transmission teardown. Well explained, piece by piece. Subbed.

@VictorMHC 6 лет назад

I Dont Even Repair Transmisions, But I Watch The Entire Video Because I Like To Learn Things, And You Explain Very Good The Small Detail, Greetings From Mexico.

@alfredozertuche784 2 года назад

Ive worked on helicopters HH-60 Pavehawk, UH-60 Blackhawk, UH-1N Huey, AH-64 Apache, OH-58 Kiowa. I use to do odd jobs on the side for basic automotive repair. Now that im picking up alot more work and trying to learn the inner working of transmissions. Watching your videos is like being taught by an instructor. Youre very thorough on your videos getting into detailed information on the transmissions. I admire your work and look forward to learning more. have a good day and thanks for the info

@Roosterbate44 5 лет назад

Well done my friend extremely impressed with your knowledge and skill looking forward to more of your videos.

@itsangelduhfoo 7 лет назад

IDK WHY IM HERE LOL I DONT EVEN WORK ON CARS BUT I DO EDIT VIDEO FOR NEWS SEGMENTS BUT YOUR PACE OF THIS VIDEO IS AMAZING AND HAS MY ATTENTION TO THE FULLEST. I GET LOST ON RU-vid SOMETIMES AND RUN ACROSS THINGS LIKE THIS. GOOD JOB SIR. KEEP UP YOUR HARD WORK

@zacbooterbaugh2234 7 лет назад

Shut the fuck up

@robertgolden4436 5 лет назад

Awesome, great job with the details!

@daniel202010 3 года назад

Brother man. I really appreciate these th350 videos. Me and my brother in law watched them about 72 3/8 times lol. Got it done though again thanks

@jbsprojects8186 3 года назад

I can't tell you how great of a instruction video this is ...one of the best on RU-vid thx you...gonna try to rebuild one myself

@chrisnicholson4167 3 года назад

This is spectacular! Just set up a table in front of my monitor and tore down my TH350C... it took me about 2 hours but hey i did eat lunch! Your a true pro Hiram! That was a pretty cool trick to pop out the pump! The only con to the whole thing is now my entire garage smells like an overheated transmission... oh well, good motivation to get it put back together sooner rather than later!

@AutomaticTransmission 3 года назад

Awesome

@johnvanover8014 3 года назад

Just a novice builder of 40 years and we are never to old to learn.. Excellent Video Hirm

@AutomaticTransmission 3 года назад

Thank you sir.

@JOESOLDROCK 5 лет назад

This should be required watching in trade schools. Excellent and easily understood.

@kc0idj 8 лет назад

Thank you so much for making these videos! They are very informative and very well explained! Take care Hiram!

@gman4dx266 8 лет назад

Excellent video Hiram! Waiting for part 2! I do transmissions on the side but sometimes its fun for me to just sit back and watch.

@tomnoller2427 5 лет назад

Excellent, Hiram! Thank you for the great help!

@whitehorse1959 6 лет назад

Love the way you just toss the parts around almost carelessly. I'd be like, "where does this go?" afterwards.

@thisisyourcaptainspeaking2259 4 года назад

Dude, I really enjoyed your th-350 videos, thanks man!

@LoneWolfZ 5 лет назад

Wow. The voodoo that is the automatic is finally revealed! Seriously though, you make that look too easy. I have torn them apart for the aluminum case, but it was always a destructive operation, and it always took way longer than that. Now I'm building a 75 Nova, and I might just have the confidence to try rebuilding my own. Thanks for the video

@GOMEZJ76 8 лет назад

Hiram, you make it look so easy. Thank you for posting these videos. Keep up the great work and keep them coming!!!

@chairmnofthboard 7 лет назад

Great video, thanks for taking the time.

@jgcorn61 8 лет назад

I love this stuff! because of these videos Im going to replace my valve body on a 4L80E with confidence. Thank you sir. CHEERS!

@rcdogmanduh4440 6 лет назад

You cant teach experience, you are the master!

@bengreen6980 5 лет назад

Fantastic video, very thorough and informative. Thanks for making it Hiram.

@robertgift 4 года назад

Wow! Well done! Nice seeing an expert at work. Thank you.

@Duddie82 4 года назад

I have a 350 Turbo transmission, and will definitely have it rebuilt. I drove a 1978 Camaro in the 80s, and I had a shift kit I think it was called, to make my tires chirp from first to second gear. everyone was doing it back then. I have a 1978 Camaro I am building, and I will be putting my 350 Turbo transmission in. I had my son pick up a 350 Transmission, and then had him pick up my Turbo 350 Transmission, he was not thinking that 350 Turbo would weight more,, lol he was surprised,

@dronedbr 8 лет назад

Good job explaining disassembly and part functions. I feel like I am back in Votech!

@humbertogsalazar 7 лет назад

I know nothing about transmissions but I found this video so interesting, you are obviously a master of your trade. Keep it up!

@garman1966 5 лет назад

I said to myself I wasn't going to watch a transmission rebuild and here I am, half way through! Going for the rest!

@destiladosdealambiquelyvidigal 5 лет назад

Thank you for teaching, I learn a lot from you. BRAZIL / Minas Gerais. I'm a big fan, of your work.

@jackwebb5917 6 лет назад

You’re the master!!! This is THE best transmission rebuild video!!!

@automaster209 6 лет назад

Good video. I used to teach the automatic transmission class at a trade school and have built many transmissions in my 30 years. It was awesome reminiscing especially at the 'case saver' kit. LOL. I installed quite a few of those due to the lugs wearing from being hammered in the case. Cool video. Love it.

@jgeorges3061 8 лет назад

cool thing to watch and very very good info as always thanks a million bro.

@WZRDr 5 лет назад

always nice when an expert in the trade is explaining his thing

@63256325N 8 лет назад

Good to see you. Thanks for the video.

@jb7864 6 лет назад

Hi Hiram.. Absolutely an awesome video.. I can not thank you enough for this post.. I just got a 1977 Chevy Pick Up Truck with a TH350 transmission. I am planning to overhaul it and now I know what to look for and how to do it, with your disclaimer in mind offcourse ;-) Please do not stop making these VLOG's.... Thank you so much. You are a legend..

@davie261 5 лет назад

You sir, are a transmission guru. A true professional.

@stubreegle4136 3 года назад

thank you for your detailed description. you are a great teacher.

@mikekramer3133 8 лет назад

thank you hiram you are a professional and you are easy to follow without any BS or delays I enjoyed your show and will watch any others you have.....................Mike K

@ninagall7500 5 лет назад

Impressive, sir. Transmissions are black magic to me, thanks for confirming that all i can do is change the transmission filter!

@hadzicana1 5 лет назад

This was the best video I have seen for the turbo 350. ......Ko ne poznaje engleski a ima osnove iz automackih menjaca MOZE IZ OVOG VIDEA DOSTA DA NAUCI.....hvala ..ciao from Serbia

@sheep1ewe 5 лет назад

Excelent tutorial! Thank You for uploading.

@jeffbohn2576 5 лет назад

You are a genius..thank you for showing the ins and outs of your craft

@jeremyhanna3852 6 лет назад

Best video break down of trans I have ever seen

@smitty03281964 8 лет назад

Brother I would love to work with you. Just watching you master your craft gave me goose bumps. I am self taught but for the past 13 years I worked in a shop that literally was a mechanics graveyard that killed a lot of my knowledge because that shop pretty much only had us do certain things. I was strictly working on buses. Thanks for narrating while working.

@robduchesne7223 5 лет назад

I happen by mistake on your video and I wish my teacher was 1/2 as good as you,you are not dry at all and was very happy to sub you and follow you from now on.thank you for you insights.

@antegas 8 лет назад

Thank you! very much Hiram. When the part 2 is comming. I'm going to repair same transmmision unit a few day. I'm following all of youre's videos in order to do a good job.