roundman

Believe you got it backswards MD, the autos came with the 2.73's and the stick cars had the 3.08's, at least in '88 that's the way they came.

94BLUEGT

all ya got to do is look for your axel code on your door Its the same label where your VIN# is!!. Look under the AX on the bottom right!! Mine has a E which is 3.27. Here are the codes!!

8- 2.73
Y- 3.08
F- 3.45
5- 3.27
6- 3.73
2- 3.55 ...1989-91
7- 3.07 ...1992-93 M- 2.73
Z- 3.08
R- 3.45
E- 3.27
W-3.73
K- 3.55 ...1989-91


Thanks Mark

sc94gt

Personally, I like the 3.08 gears in my 94 GT. It's good for high speeds and cruising.
But, if you do get the 3.73's or 4.10's maybe consider getting the car to hook better (get some traction bars or fatter tires if you already haven't).

chriscindy6369

Mine had 3.08's and i ran mid 11's with 477 rwhp 5 speed. I have 3.73's to install next week with lower and upper control arms, And welding in Sub frames also. gears do help and i run a 315/35/17 rear tire

mdvaldosta

You may be right, your comment makes me unsure now. I just did some research and I've found that on the 87-93 cars the stock ratio was 2.73 code (M) upgrade for 5 speed was 3.08 (Z) Upgrade for AOD was 3.27 (E) and 3.55's did not become a factory option until 2003.

So now I know, and so does anyone else wondering exactly.