How do I find out what axle ratio my A4 1996 z28 has? As I understand it, it could be either 2.73 or 3.24 or something like that. I suppose I could do the math and see where it redlines, but I'd like something more simple

 

What does the code on the door say. It should say GU# <---- What is the number? We'll tell ya then.

 

gu4 3:08
gu5 3:23
gu6 3:42