With 9-1/2 Inch Ring Gear

Chevrolet 8 1/2 Inch Ring Gear
Ring Gear And Pinion Backlash
Adjusted By Shims - 0.005-0.008 in

Pinion Bearing Preload, "Spacer"
New Bearing - 20-25 in.lb
Used Bearing 10-15 in.lb