Ring Gear, Differential

8.8-Inch Ring Gear
Ring gear bolts 105 Nm (77 ft. lbs.)
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(0.004)
Maximum backface ring gear runout 0.102(0.004)

9.75-Inch Ring Gear
Differential ring gear maximum backlash variation between teeth 0.102 mm (0.004 inch)
Backlash between differential ring gear and pinion teeth: 0.20-0.38 mm (0.008-0.015 inch) maximum 0.305-0.381 mm (0.012-0.015 inch) preferred
Maximum back face differential ring gear runout 0.102 mm (0.004 inch)
Differential ring gear bolts 150 Nm (111 ft. lbs.)

10.25-Inch Ring Gear
Ring Gear Maximum Backlash Variation Between Teeth 0.102(0.004)
Maximum Back Face Ring Gear Runout min (Inch) 0.102(0.004)
Ring Gear Bolts 136-163 Nm (100-120 ft. lbs.)
Backlash Between Ring Gear and Pinion Teeth: 0.203-0.381 (0.008-0.015) 0.305-0.381 (0.012-0.015) preferred

Ford 8.8-Inch Ring Gear
Ring gear backlash [preferred]: 0.203-0.381 mm (0.008-0.015 inch) [0.305-0.381 mm (0.012-0.015 inch)]
Ring gear maximum backface runout 0.102-0.004 mm (0.004-0.0001 inch)
Ring gear bolts 105 Nm (77 ft. lbs.)