TH 400 needed

[Asgeir]

Well finally got the truck running with my 383 stroker I built and the 700R4 trans died on me. Lost 3rd and 4th gear. Trans shop quoted over $2,600 to rebuild which I thought is stupid. So I want to replace it with a TH400, does anybody in Oklahoma have one they want to part with?

 

[fast 99]

I don't know how stupid the price is but everything automobile has gone up much more than the advertised national inflation rate. Just got back a TH350 that needed to be resealed, $1500.

 

[Asgeir]

I don't know how stupid the price is but everything automobile has gone up much more than the advertised national inflation rate. Just got back a TH350 that needed to be resealed, $1500.

I know for the price they quoted me, I can get on speedway and order a new rebuilt transmission thats better then stock, just have to get a torque converter. I just dont have the $2500 for either lol. Dropped all on building that 383. But I agree, shop rates are stupid high.

 

[Ricko1966]

I think these days your chances of finding a good used 4l80e is better than finding a good used 400. You will have to pirate or buy,build a shift controller. Do something to regulate line pressure like transgo 48 mod. Or modify to run on full line pressure. Then with 48 mod or full line pressure wire for manual valve body control. Bonus is you'll have a 400 with overdrive.

 

[Catbox]

I think these days your chances of finding a good used 4l80e is better than finding a good used 400. You will have to pirate or buy,build a shift controller. Do something to regulate line pressure like transgo 48 mod. Or modify to run on full line pressure. Then with 48 mod or full line pressure wire for manual valve body control. Bonus is you'll have a 400 with overdrive.

Those are $330 here out the door at the pick n pull.
We just bought one at that price.

 

[Ricko1966]

Those are $330 here out the door at the pick n pull.
We just bought one at that price.

Do you know 48 mod. It adds a vacuum modulator to control line pressure. Then you can shift it how ever you like. Switches,modified valve body wiring, for manual control. Manual valve body,or cheap ebay controller (about 30 bucks)

 

[Catbox]

Do you know 48 mod. It adds a vacuum modulator to control line pressure. Then you can shift it how ever you like. Switches,modified valve body wiring for manual control. Manual valve body,or cheap ebay controller (about 30 bucks)

I do not.
But I will as this sounds interesting.
I was thinking of sending it to Nick for a full rebuild on mine.
Max's fresh one may not need anything done to it to be able to run it as is.

 

[Ricko1966]

I do not.
But I will as this sounds interesting.
I was thinking of sending it to Nick for a full rebuild on mine.
Max's fresh one may not need anything done to it to be able to run it as is.

How to wire a 4L80E transmission for manual shifting without a controller

The GM 4L80E transmission was produced from 1991 - 2009 in factory vehicles, they still sell it from GMPP. However, they changed the connector in 1993, this connector is from 1993 on. The service manuals state the older vehicles have to be...

ck5.com

TransGo - 48-MOD - 1991-on 4L80E Vacuum Modulator Kit

Great for transplants! Provides a more aggressive and tunable pressure boost curve with engine vacuum instead of vehicle PCM controlling PCS/EPC Solenoid.

transgo.com

 

[NickTransmissions]

Well finally got the truck running with my 383 stroker I built and the 700R4 trans died on me. Lost 3rd and 4th gear. Trans shop quoted over $2,600 to rebuild which I thought is stupid. So I want to replace it with a TH400, does anybody in Oklahoma have one they want to part with?

$2600 seems in the right neighborhood for a 700R4 behind a 383, and I've hand customers spend a lot more than that to get them to the point they're survivable at 383/Big Block power and torque levels...Whether you thought it was a stupid idea to dump $2600 into a 700R4 is another matter but the shop's price sounds reasonable to me.

Go to any wrecking yard and yank one out then go through it. TH400s are relatively straightforward to work on, have very few weaknesses, all of which can be addressed on overhaul and will last a very long time if you put it together correctly.

 

[SquareRoot]

That 383 deserves 4 gears behind it. Anything less is blasphemy.

 

[bucket]

That 383 deserves 4 gears behind it. Anything less is blasphemy.

Nah... Powerglide.





Sorry, couldn't resist

 

[idahovette]

Nah... Powerglide.





Sorry, couldn't resist

I have 2 powerglides. One is a 68 ChevyII glide out of my son's Nova, built, with a 2500 stall convertor and the other is a stock 66 ChevyII glide from my original 283 hardtop.......just so ya know???

 

[Rusty Nail]

Stand by.

 

[dragstews]

I have one for sale ...
Built it long ago, got a world of goodies in it ..

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Still works as good as the day it went on line ..
Reason why I pulled it was to replace it with a 4L85E ..

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Not for sale anymore ...
Just sold it ..

This will be it's new home ..

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You must be registered for see images attach

 

[Rusty Nail]

Oh yeah I forgot about this.
I've got one in my garage..