stock should be 3.31:1
Actually, for a 1993, my notes say it's a 3.08 TL.
The 3.31 wasn't introduced until into the 1994 model year, again, according to my notes.
Of course, presuming the original diff, you could just read the axle code in the driver's door and see what it's supposed to have. Second is to check the tag on the diff itself.
RwP
all 3.8L(including SC) Auto have 3.27, 3.8L Manual has 2.73, and All V8s have 3.08. Unless it was special ordered with different gears
Yep, 3.27s in all the cars Ive seen so far with a aod. Man, it doesnt sound like much but the 3L31s would have been great in all the cars. Out of all the differentials i set up I either used the same shim that was behind the pinion, or if it was a empty housing, i would used the average of what i have seen. only once have i had to change shims. Almost everytime it was .025" that worked. I set a rear one time by finding the pinion depth and it was a waste of time since a change in temp would throw everything off a few thousandths. But, that was a aluminum housing too.
My 94 SC came with 3.31's from the factory and it was not special orderd.