TH400 Tips Part Two!

[@oldman-zr2ru]

You broke my heart when you showed that BOP bellhousing cut off. Had I had the vision for the deep future I would have taken more TH 400's out of the junk yards when I was pulling big block Olds motors. Back then if you pulled the bolts and hardware you could buy an Olds 455 and TH 400 for $125.00. I think the best thing I ever did was after I found an old 67 Olds 400/400 out of a 442 I was in a junkyard and found a 67 Olds 425/400 and pulled them both incase I needed spare parts for the engine/trans out of the 442 motor. Turns out the 442 trans needed a pump but it was a switch pitch and I had to have that but the spare 67 400 I got had a good one in it. I later found another 67 switch pitch trans and pulled it too.

[@johnholloway2445]

great video .................keep em comin

[@petercraig806]

Thanks Shawn. Keep up the good work.

[@quartermilejunkie5439]

It was both entertaining and educational, as usual.

[@mountainsgarage]

Thanks!!

[@Daniel-Johnson]

Thank you Shawn, I've been a follower since the beginning but this is my first time commenting. I just wanted to say thank you for giving me the confidence to tackle my transmission. I have been putting it off for months and it's time do dive in ( 86 2wd Th400) I did a couple about 15 years ago but just basic overhauls and they had no issues. This one has all the goodies stacked next to it, Full manual valve body, steel hub, spirals, 34 element sprag etc.. been very intimidating looking at all those new parts but you are so clear on explaining everything I'm feeling much more at ease with it so thank you! Wish me luck! Haha

[@mountainsgarage]

Awesome! If I can help let me know!

[@Daniel-Johnson]

@@mountainsgarage Thank you buddy!

[@Daniel-Johnson]

@@mountainsgarageShawn! I am taking you up on that offer! 😉 I am using a single stage dump valve on my build.. I am not sure how you feel about those.. my question is by me using the dump valve do I still need to install and drill the grub screw in the pump on the converter feed circuit? Or is the dump valve going to be accomplishing the same thing? Thank you sir!

[@mountainsgarage]

@@Daniel-Johnson The converter charge pressure mod is always on the job, the dump is momentarily. Dump valves and other location restrictors and their use continues to evolve, cool technology!

[@Daniel-Johnson]

@@mountainsgarage got it! Thanks a million buddy it is so nice to ask a question and get an answer, thank you for taking the time to reply! Means a lot to me and I appreciate you!

[@BigFun4Life]

Thanks Shawn for another great video.I just snatched up a 68 th400 short shaft that came out of a car that had either 396-402.Can’t wait to open it up..

[@mountainsgarage]

Nice find!

[@Bill-s2z8u]

❤ from California

[@timweb1510]

Thanks for helping us out with info, I need to research mine

[@keiththecarguy1967]

Thanks for the video, great info!

[@jonalarcon8564]

Your videos are very informative thank you very much!!!!!!

[@mountainsgarage]

Appreciate the kindness!

[@cjscottallen]

Excellent information thumbs up and I subscribed things I really need to know

[@vrg69]

Got alot out of it and I'm saving your videos for when I get started on mine thanks for info

[@mountainsgarage]

Thanks

[@timdontwannasay5889]

Good information like EVERY video I've seen of yours!

[@mountainsgarage]

Thank you!!

[@patrickveltri3520]

Great as always. Looking forward to seeing the street/strip build. I'll be holding off on my build until I watch your video on it.

[@mountainsgarage]

I should be on it in a week or so. Thanks!

[@patrickveltri3520]

@@mountainsgarage no worries, I've got a ton of other work to do, just in the planning and gathering stage.

[@jimchevy4134]

Thanks for the information

[@KarKamp]

Another Great video again keep up the good work an serving out that information. Other video ideas th350, powerglide, info on buying the right stall convert, any indepth engine building tips..

[@mountainsgarage]

Great ideas! Thanks!

[@davkime1]

Thank you so much. I ran across this as I was looking for information on my transmission for my P 30 chassis motorhome. It has a TH 400 but sounds like mine is like yours in this video that may be a 475? It has the parking brake and cable connected to it just like the one in your picture. Seems to run fine but does not kick down and has the electrical connection on it. Speedometer is also reading 5 mph slow.

[@rtrayl]

Thanks for the info

[@kevinsimpson6755]

Great video thanks for putting it together

[@mountainsgarage]

Thanks!

[@stellanti]

Thanks for letting me keep the tag Shawn!!!

[@robcampbell8180]

Great info! You know your stuff!

[@mountainsgarage]

Thanks!

[@jeffyoung2089]

Thanks!

[@veggiepowered]

I'am Your Newest Subscriber Great Videos My 1988 G20 Camper Van Has A TH400 wish it had 700R4 it drinks fuel with no overdrive

[@Joeylucio22]

Can you show how to delete a parking brake

[@lucasblake7224]

Great info

[@jonalarcon8564]

I have a few TH 400 and TH 350

[@jeffrey4547]

i have the 02xx 400r turbo they have 02xx welded on the bell housing that is the best they build stock u can only buy them as a crate trans but u can find them in trucks and motorhomes from 80's to 2000. gm calls them a strip or heavy applications they are good to 800 hp stock and on the break drum it has bolts no studs it is still the old school casing with no speedo gears just the teeth on the shaft so easy fix. the best part about them i get them for free most have the 450 hp 454 in front of them that would be the type of motor home u want to find that has the upper package with the 450 hp 454 so i would check the paper work on it most will have it with the rig . the engine comes with steel crank heavy rods high flow heads the trans has the heavy duty 8 bolt pump heavy clutches stage one shift kit it is perfect for a street build . i have got 4 setups for free from 6,000 to 58,000 miles on them saves a sh. ton of money on a build to buy it new with everything u get it would cost about 20,000 bucks just the short block is 8000 to buy it from GM. this how i only have 2000 bucks in my 68 chevy pu

[@ericvitelli7113]

You would be great at teaching an apprentice - you explain things well.

[@mountainsgarage]

Thanks!!

[@tilt213]

Just picked up two hd 400's . One is a 87 FKA (475) with the brake drum and the other is a 86 FJA with a regular bolt on yolk. Both had big blocks in front of them. I'm hoping the 86 is also a 475 with the three letter tag.

[@mountainsgarage]

The 86 is probably a TH400, but still good stuff!

[@jaytank31]

My tag is 86 F1A 15840. What does that mean

[@tilt213]

@@jaytank31F1A OR FJA? 86 FJA I have came out of a 454 k3500 good trans, but not straight cuts which is perfectly okay

[@jaytank31]

@@tilt213 I thought it was actually FLA I can only read the stamp

[@terrancedaves7514]

Hey thank you for sharing your knowledge. But I have a question if you had the choice of an unknown BOP for 120$ or a steel vent tube older year for 400$ which get for a drag car build?

[@mountainsgarage]

@@terrancedaves7514 BOP and buy a ATI or BTE bellhousing if it needs to fit a Chevy.

[@terrancedaves7514]

@ thank you!

[@brianl6798]

Good day, great video. Where are the yokes available for $35? Thank you

[@mountainsgarage]

I recently bought 4 on eBay for $34 each, but the normal price has climbed to around $75.

[@brianl6798]

@@mountainsgarage Thank you for the quick reply. That seems to be the current price or higher (Canada...). Appreciate the follow-up. take it easy

[@blazelarson1427]

Thanks for sharing, would you mind giving me input on my build? I have a crate SBC 350 and a TH400. It’s from a 68 GMC truck I think. The transmission has been rebuilt and resting in an 86 Camaro. I had a drive shaft custom made for it and also installed UMI mount and torque bar. After all is assembled, the slip yoke is out of the tail shaft by 2”. This is my concern, should I try it?

[@speedracer412]

Wish you were close to pa I'd give you 2 cases I got one is a BOP unfortunately

[@mountainsgarage]

That would be awesome!

[@andyburk4825]

On reassembly would it be a good idea to permatex the front pump bolts and blue loctite ?

[@mountainsgarage]

I am not a fan of sealer or loctite in that area in stock form. With an aftermarket bellhousing I do put a small amount under the head of the bolt. A tiny bit of loctite on the threads is OK but don’t get carried away!

[@andyburk4825]

@@mountainsgarage Thanks for the answer !

[@caseypayne1956]

Have you ever seen an AMC th400 case? Im building one now, with alot of help from your vids.

[@mountainsgarage]

Yes, pulled many in Wagoneers. Glad to help out!

[@caseypayne1956]

@@mountainsgarage This is in a 72 J-4500 that I'm building. Factory 360, TH400, D20. Started out just resealing the trans, now I'm adding additional clutches and over-building the crap outta it

[@mountainsgarage]

@@caseypayne1956 Awesome!

[@andrewadams1428]

Do you have a fluid flow video. I rebuilt 1 with a trans brake and reverse manual valve body. have only 1st gear. Trying to figure out my issue. Pulled it back out today

[@kahikohammah]

Hi I have a few questions about speedometer drive gear and driven gear. My wife and I just bought a rebuilt th400 transmission setup for an electric speedometer system. We have a mechanical speedometer system on our Chevelle. I’ve removed the tail end of the transmission already. How do I remove the drive gear from the transmission shaft? Should I pull it off or cut it off? Is there an existing hole on the shaft for the drive gear clip, does it come like that already? Or would it be better to convert to an electric speedometer system? Need help please 🙏🏽🙏🏽

[@aladwanit]

Hi How i can identify gmc / chevy truck 1982 / 400 gear ⚙️ If you please tell some signs of 400 gear

[@dokterdave8347]

Hey Shawn what's the procedure for removing the vent tube nut? I've got a 400 with the tube broken 🤔✌

[@BigMikesGarage]

Good info. What do you normally have to pay for a "core" transmission?

[@mountainsgarage]

I am happy $1-300 To date $300 was the most I paid, but it was nice and has an aluminum deep pan.

[@wenzelsstoneponyequine3667]

What is the transmission with the brake drum worth I know where one is

[@bobbie8085]

Thanks

[@808redneckify]

Would aftermarket parts for a th400 work in a th475?

[@mountainsgarage]

Yes

[@AlexRamirez-lf1wj]

What does it mean when it has a x3 on top of tranny' I have a 68 Buick Riviera transmission not original I have 2 68 Rivieras one of them I'm fixing the transmission does not get 3rd gear any idea what the problem is ?

[@wayneszalay8485]

Are there 2 different size output shafts. i recently tried to put a drive shaft in that was supsoed to be for a turbo 400 but there was no way it would fit.

[@mountainsgarage]

In the short shaft they are the big 32 spline yoke, in the longer output shafts some were 27 spline TH350 size.

[@grannysgarage8101]

Are all the cases/parts interchangeable between 65-84? I have a cracked 72 th400 and I'd like to put all the guts into an 82 housing that I have. Thanks

[@jonalarcon8564]

I have the good TH 400s and TH 350s

[@funfun8095]

👍

[@dblock3812]

How do you tell a 375 from a 400

[@mountainsgarage]

The 375 has a medium length output shaft in TH350 size.

[@bebetekracing2412]

👍👍😎😎 u da man man

[@mountainsgarage]

Thanks!

[@BratPackTravels]

I have one. I'll trade you . I drive it everyday. I need four speed.