TM 9-2320-289-34
6-5.
FRONT AND REAR AXLE DIFFERENTIAL REPLACEMENT (M1009) (Con’t).
17. If backlash is not within limits, decrease shim thickness on one side and increase shim
thickness on other side by an equal amount:
(a) If backlash exceeds .008 in. (0.20 mm), increase shim thickness on ring gear (12) side
and decrease thickness on opposite side by an equal amount.
(b) If backlash is less than 0.005 in. (0.13 mm), decrease shim thickness on ring gear (12)
side and increase thickness on opposite side by an equal amount.
NOTE
If drive pinion and ring gear (12) were replaced, perform steps 20-23 to
check for proper gear tooth contact pattern.
18. Wipe any lubricant from housing and clean each tooth of ring gear (12).
19. Apply prussian blue dye sparingly to all ring gear (12) teeth using medium stiff brush, Area of
tooth contact should be clearly visible after load is applied to gears.
NOTE
Excessive turning of ring gear (12) is not recommended. Ring gear should
only be turned enough to provide tooth contact pattern.
20. Apply load until it takes a torque of 40-50 Ib.-ft. (54-68 N.m) to turn drive pinion. Turn
companion flange so that ring gear (12) turns 1 full revolution, then reverse so that ring gear
turns 1 full revolution in opposite direction.
TA50520
6-22
