I yanked the motor and tranny out of my '73 Centurion. The motor is a 455 4BBL. I tried looking up a VIN decoder, figured out most of the VIN, but couldn't decode the digit for tranny. The tailshaft has 6 bolts (which I think is TH400 VS TH350's 4 bolts), but the tranny pan isn't square like the pans on GM trucks (what I'm used to). The tranny pan says "hydra-matic Div of GMC) The pan is angled on the front passenger corner, but not a 45* angle like a GM truck TH350, it makes room for a vaccum deal. I'm a little confused if it's a TH400 or TH350. Can anyone tell me based off what I've said so far? I can answer any questions since it's sitting on my garage floor right now. Thanks!
Sweet. That tranny guide will be perfect. I wanna say that the pan looks like the TH400 in that picture, but I'll confirm tonight when I get home. I was told that the Buick TH400 and Chevy TH400 are the same except for the bellhousing bolt pattern. Is this correct? I'm hoping to be able to take a Chevy tailshaft from a 4WD TH400 and swap it onto this Buick 2WD TH400.
