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Albatrossian · 05-20-2009, 09:09 PM

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.

05-20-2009, 09:09 PM	#7
Albatrossian Georgia Boy Join Date: Jun 2008 Location: Douglas, Georgia Posts: 370	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. __________________ 81 GMC High Sierra, 2WD, 357ci/700R4, 3.73s, posi.