Are all th400 transmissions the same?

[ih8mud]

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.

[Lt.Del]

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

SgtDel

[roundedline]

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

Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project

[Blazin]

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.