th400 modification

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Mar 18, 2006 | 11:46 PM

Hinz-73

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Instructor

Joined: Sep 2004

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From: Northern California

th400 modification

Has anyone tried the B&M Shift improver kit on their th400?

I'm considering it and would like to get your feedback.

Good modification or not?

I am considering the B&M "stage 1, RV / Heavy Duty" kit.

Thanks.

Mar 19, 2006 | 02:13 AM

VETDRMS

Melting Slicks

Joined: Dec 2001

Posts: 2,025

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From: Billings MT

Yes, I have it on my TH400 in whatever the highest setting is and it has worked well, I noticed a difference when I had a tight torque converter, but now its so loose you seldom feel it shift..lol

Mar 19, 2006 | 10:38 AM

Hinz-73

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From: Northern California

Thanks for the reply.

Anyone else?

Mar 19, 2006 | 10:57 AM

GUSTO14

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From: eastern NC

Quote:

Originally Posted by Hinz-73

Has anyone tried the B&M Shift improver kit ...?

I'm considering it and would like to get your feedback.

Good modification or not?.....

Thanks.

Yes... I believe it's one of the easiest and least expensive ways there is to wake up the performance of an automatic. I did this in the past on a number of Fords I have owned but have never done it on a Chevy. The results were immediate and very impressive. (My 289 Falcon could chirp the tires easily in 3rd gear.) It is an easy modification that any handy wrench can accomplish.

I also chose those times to install a drain plug in the trans pan. Find an area of the pan that will not interfere with the valve body or filter and weld a 3/8" thick 1" square plate inside the pan. Then drill and tap it for a standard drain plug and life will get much easier...

Good luck... GUSTO

Mar 19, 2006 | 11:15 AM

Hinz-73

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Joined: Sep 2004

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From: Northern California

Thanks Gusto.

I am planning on doing the drain plug at the same time.

I am somewhat concerned about the increased pressure the transmission will generate, however, the trans is relatively new. Ony 1000 miles on it to date.

Bret

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