What size diff is in this car?
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Thread Starter
Pro
Joined: Sep 2008
Posts: 558
Likes: 0
From: 707 CA
Thanks for the replies. The reason I ask is because I'm interested i a 03 with a supercharger and thought it was wrong info about the rear end (a 2:73)..so if I end up getting it I'd change the rear end to at lease a 3:15...
Le Mans Master
Joined: Jul 2009
Posts: 9,526
Likes: 12
From: Los Angeles California
GU2 is fantastic for freeway flying! 
I had a GU2 in my first Trans Am (It was an auto obviously) but I got nearly 400 miles to the tank going REALLY fast on the 15 to Vegas... Good times.
I had a GU2 in my first Trans Am (It was an auto obviously) but I got nearly 400 miles to the tank going REALLY fast on the 15 to Vegas... Good times.
Safety Car
Joined: Oct 2004
Posts: 4,816
Likes: 132
From: Plano TX
Do you know for certain that this car has the stock rear end?? Have you talked to the owner? I figure that if someone has spent the money on a Supercharger, they probably have done other mods, like having the tranny rebuilt to a Level IV, different rear end gearing etc.. If you look at the rear end diff, you will see a small aluminum tag that says GETRAG on it, with the gear ratio on it too.. I would not count on what the glove box option sheet says
Thread Starter
Pro
Joined: Sep 2008
Posts: 558
Likes: 0
From: 707 CA
Oh yes I'm familiar with the different diffs. I had all three in my '97. Not much different in the 3:15 and 3:42. With the setup on this car you would at lease want a 3:15...
Thread Starter
Pro
Joined: Sep 2008
Posts: 558
Likes: 0
From: 707 CA
Do you know for certain that this car has the stock rear end?? Have you talked to the owner? I figure that if someone has spent the money on a Supercharger, they probably have done other mods, like having the tranny rebuilt to a Level IV, different rear end gearing etc.. If you look at the rear end diff, you will see a small aluminum tag that says GETRAG on it, with the gear ratio on it too.. I would not count on what the glove box option sheet says
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