Quote:
Originally Posted by crossy
(1) TH-400 longtail, 2WD, small output, VERY hard to come by as a direct replacement for a 700R4, same length & output size. Chevy pattern, Known good, I drove the truck here. Only one of these I've ever had! $175.
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Im pretty sure you are talking about a THM-375. Basically a th350 in a th400 case. There is a tag on it and that if it can be decoded will be able to better identify it.
http://www.nastyz28.com/transid.html
Cant find any pictures of the tailshaft. But it usually has THM-375 on the bottom of the tailshaft where the transmission mount goes.
Edit: The THM-375 has a small shaft and same spline count as a th350. Technically is a th400 or a mildly beefed up version of a th350 its really a mix between the two.