My information states that for stock trucks using the GM 8.875" 12 Bolt Differential:
3-Series: (3.42 and numerically lower)
4-Series: (3.73 and numerically higher)
Richmond Gear as well as many other aftermarket gear makers have redesigned the wheel, so to say, and make gears such that if you know which carrier you have, their gears will fit it.
I hope this helps.
Last edited by Hot Rod John; 10/16/2010 12:34 AM.
