I have a 2000 Silverado 1500 with a 6 inch lift and 35" tires. It has 3.73 gears and I was thinking of swapping 4.88 gears and putting a locker in the rear. What difference will there be going from a 3.73 to a 4.88 gear? Also I think that my pickup has a 10 bolt, 8.6" rear end with 28 spline. How do I find out exactly what it is and what gears to order? Any info would help thanks.

 

All I really need to know is what rear end is in my pickup. Is it an 8.5 or 8.6 inch rear end? Does anyone know how to find this out?

 

it is a 10 bolt 8.6

 

4.88's a nice gear for that wheel/lift/tire combination.