How can I tell what gears I have

 

Look on your door jamb, there's a sticker. Look for the Axle code (two either a letter and a number or two numbers).

I have code 19, which is a 3.55 open diff.

18 = 3.08 Non-LS
19 = 3.55 Non-LS
B6 = 3.73 LS
H9 = 3.55 LS

 

thanks