Ford - 8.8. Inch Ring Gear

Clearance, Tolerance and Adjustments
Maximum back face ring gear runout 0.102 mm (0.004 inch)
Backlash between ring gear and pinion teeth
0.203-0.381 (0.305-0.381 preferred)
0.008-0.015 (0.012-0.015 preferred)
Ring gear maximum backlash variation between teeth 0.102 mm (0.004 inch)

Torque Specifications
Ring Gear Bolts 105 Nm (77 ft. lbs.)