Gear ratios?

[jimrockford]

What are the gear ratios in the automatic installed in most 77 Cutlass' (with the 350)? How about in my '77 S with a 3-speed manual? I'm trying to compare the two. How tough would it be to move the 3 on the tree I have to a floor shift?

[damaged442]

OK here goes.
In 1977 you could have had the following ratios. Look on the front of the right axle for the code and it breaks down like this.
AA 2.41
AB 2.56
AC 2.73
AF 3.08
AT 3.23
AU 3.08
AX 2.73
CA 2.41 anti spin
CB 2.56 anti spin
CC 2.73 anti spin
CF 3.08 anti spin
CT 3.23 anti spin
CU 3.08 anti spin
CX 2.73 anti spin

The axle should have a code on it that starts with 7 (model year 77), then the two letter code above, followed by "O" for Oldsmobile, then numbers for day of year made, followed by another number for the shift it was built on. If you do not have an Oldsmobile rear, you may have B for Buick, P for Pontiac, C for Buffalo, G for Chevrolet Gear and Axle, K for GM of Canada, W for Warren, or M for Pontiac of Canada.

I retrieved all info from "Catalog of Oldsmobile 442, W-Machines, and Hurst Olds ID Numbers 1964-91" put out by Cars and Parts Magazine. It's got quite a bit of worthwhile info in it. Hope this helps. If my opinion matters, both of my cars are three on the tree. I'd keep yours that way. After all though, it is YOUR car, and YOU gotta be happy with it. Best of luck to ya!

[damaged442]

Sorry, didn't see you had a manual. Mine are autos. In your case, I'd really keep it that way! That is pretty rare! Good luck!