181 FBI Axle

Mechanical Specifications

Axle Ratio 3.07,3.55,3.73,4.10
Differential Side Gear Clearance 0.12-0.20 mm (0.005-0.008 in.)
Ring Gear Diameter 180.9 mm (7.125 in.)
Ring Gear Backlash 0.13-0.20 mm (0.005-0.008 in.)
Pinion Std. Depth 92.1 mm (3.625 in.)
Pinion Bearing Preload
Original Bearings 1-2 Nm (10-20 in.lbs.)
New Bearings 1.5-4 Nm (15-35 in.lbs.)

Torque Specifications

Fill Hole Plug 34 Nm (25 ft.lbs.)
Differential Cover Bolt 41 Nm (30 ft.lbs.)
Bearing Cap Bolt 61 Nm (45 ft.lbs.)
Ring Gear Bolt 95-122 Nm (70-90 ft.lbs.)
Axle Nut 237 Nm (175 ft.lbs.)
Wheel Bearing Bolt 102 Nm (75 ft.lbs.)
Lower Ball Stud 108 Nm (80 ft.lbs.)
Upper Ball Stud 101 Nm (75 ft.lbs.)
ABS Sensor Bolt 11 Nm (96 in.lbs.)
Nut, Pinion-Minimum* 217 Nm (160 ft.lbs.)

* NOTE: Refer to Pinion Gear, Differential / Service and Repair procedures for proper pinion nut tightening instructions. Do not exceed 352 Nm (260 ft.lbs.) during collapsible spacer crushing procedure. Pinion Gear