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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: ih8mud on December 06, 2005, 06:45:00 pm

Title: Are all th400 transmissions the same?
Post by: ih8mud on December 06, 2005, 06:45:00 pm

I am considering swapping my th350 for a th400.  I have a np203 transfer case.  I have located an adapter for mating a th400 to a np203 transfer case.  My question is will any th400 work.  Just curious if there is an difference between the 2wd and the 4wd.  I've heard that there is a difference in the length of the output shaft.  I have a 79 chevy long bed pickup truck.

Title: Are all th400 transmissions the same?
Post by: Lt.Del on December 06, 2005, 05:49:00 pm

Indeed the size of the transmissions on 4x4's are different.  The shaft length is different (shorter for the 4x4's).

SgtDel

Title: Re: Are all th400 transmissions the same?
Post by: roundedline on December 06, 2005, 05:56:00 pm

4WD transmissions are lacking the tailhousing that 2WD tranny has.

Chris Lucas
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Title: Re: Are all th400 transmissions the same?
Post by: Blazin on December 07, 2005, 11:24:00 am

Not sure about the TH 400s and a 203, but I have a two wheel drive short shaft TH350 mated to a 208 case in my Blazer. I had to remove the tail shaft housing and cut about an 1 1/2" off the output shaft.