I have a 95 z28 w/ a man. 6 speed tran. I just finished playin around w/my programmer and was wondering if i guessed right on the stock rear end ratio. Does anyone know what it came stock in? Thanks for your help. My guess was 273 which means its prolly wrong b/c i'm usually not right.

 

94-02 M6's are all 3.42:1 (GU6 on the RPO code sticker) from the factory. Only the 93 wide-ratio T56 and the base A4 models (no "performance rear axle" option = 3.23 = GU5) had the 2.73's (GU2)