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Old 11-25-2025, 10:29 AM
FrkSho71 FrkSho71 is offline
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Join Date: Nov 2025
Location: Connecticut
Posts: 6
Default Suggestions?

This was my father’s daily driver through 70’s into early 80’s.
He had 114,000 miles on in when he replaced her with a new Grand Prix.
I’m finally having car restored. Local guy here in CT is doing the rear end and asked what brand of internals I wanted to use. Any suggestions would be helpful. I’m keeping 3.23 gears and thinking of going with a 200R4 trans that he will also rebuild. Car will be driven but not raced. Motor was done already with mild improvements by Jim Taylor(R.I.P.) back in 1998-ish.

I guess i’d like to know what brand for internal on rear end rebuild and any advice on what it takes to replace TH400 with a 200R4.

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