The 1947 - Present Chevrolet & GMC Truck Message Board Network - from turbo400 to 700R4 swap in 4X4 who done it??

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NASTY-LSX

02-16-2014 08:43 PM

from turbo400 to 700R4 swap in 4X4 who done it??

I have a 85 K20 with a SB and 400 trans. I am going to put a built 700 into it.
Its already being built. What I need to know is, Will the crossmember need to be relocated up some. Maybe need a longer driveshaft since the 700 is shorter.

Ive done this with a 82 4x4 and it had a T350 trans. All that was done was I pulled the 350 trans and put the 700 in its place, no problem.

Any advice would help me to know what im in for. Thanks

Im not sure if the 700 is the same length as the 400.

Greenlee

02-17-2014 10:08 AM

Re: from turbo400 to 700R4 swap in 4X4 who done it??

I went the other way from 700r4 with np208 to th400 with np208. The drive shafts were the same length. I had to drill new holes in the frame for the cross member for the th400.

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