I looked at a few trucks that had 400 trannies in them, and the crossmembers are different, at least on those trucks. The crossmember that I have seems to be from a 700r4, which was probably what trans came in that truck in the first place.

I'll probably try to round up the right crossmember. On every truck I found with a th400, the crossmember dipped down about an inch at each side, then went straight across, instead of the W shaped crossmember I have been using. The trans mount is not as high (they are 2 "U" shaped pieces of rubber), and I get better ground clearance with the flat crossmember. Seems like it should work fine.

Quote Originally Posted by streak View Post
When dealing with different transmissions that didn't come in a 4x4 you have to make thing's work,
My transmission is for a 4x4. Always has been. Truck has always been a 4x4, too! Just different transmissions...

Thanks for the help!