Ford 10.25 Inch Rear Axle

Ring gear maximum backlash variation between teeth 0.102 (0.004)
Ring Gear Bolts 136 - 163 Nm (100 - 120 ft. lbs.)
Differential ring gear maximum backlash variation between teeth 0.102 mm (0.004 inch)
Differential ring gear bolts 150 Nm (111 ft. lbs.)
Backlash Between Ring Gear and Pinion Teeth
maximum 0.203 - 0.381 (0.008 - 0.015)
preferred 0.305 - 0.381 (0.012 - 0.015)
Differential side gear rotation 27 Nm (20 ft. lbs.)