Thread: TH400/208 Installation Issue

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When dealing with different transmissions that didn't come in a 4x4 you have to make thing's work, I have seen some with the same problem you are having. Some as only one drop on the cross member and that's the ones that go with a 400 trans and it's on the passenger side and some have to put spacers between the crossmember and the frame to get the trans mount to work. The ones i've dealt with the trans mount bolts to the adapter between the trans and the transfercase. If it all didn't come from the factory that way you'll have to just make it work.

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.

Originally Posted by streak

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!