Re: th400 to 700r4 swap question
I do know that a TH400 and a 700R4 in 2WDs are *not* the same length. It's very possible they don't use the same length driveshaft. A 9" tailshaft TH350 and 700 are 1/8" difference in length.
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81 GMC High Sierra, 2WD, 357ci/700R4, 3.73s, posi.
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