Vehicle - 1972 Cutlass
Transmission - TH350
Original gears (SA - 2.73)

Gears and carrier have been changed to 3.42:1 and limited slip.
Tire size 225/70/14

The TH400 could be ordered with the 3.42 gears, but it wasn't available on the 350 cars.
Question 1: Are the output shafts on the TH350 and TH400 the same diameter?
I want to put in the proper drive and driven gear that will correct the speedometer and odometer readings. I have no interest in just running GPS for speed.

Question 2: Will the sleeve for the TH350 work with the driven gear for a TH400? There's no information about this in the 72 CSM - I looked at the charts and all they provide is the gear ratio and driven/drive gear

My guess is the output shafts are the same diameter, but I'd like confirmation before ordering a new drive gear, and/or sleeve.

 

Out put shaft NOT EVEN CLOSE, must be for TH350.

Johnny

 

Did you check other years? The W-31 cars with automatic trans (TH350) had 3.42 gears as the G92 option.

 

Kenneth, no I didn't. That's a great suggestion. I don't have a 1970 CSM though.