Figure 4-16. Differential tooth pattern.

(a) Pattern B indicates excessive contact on

the toe of the tooth. To correct this, move the ring

gear away from the pinion. Then add shims to

COAST

DRIVE

bring the pinion toward the ring gear to correct the

backlash.

(b) Pattern C indicates excessive contact at

the flank of the tooth. To correct this, remove shims

to move the pinion away from the ring gear until

the contact comes to the full working depth of the

gear tooth, without breaking contact at the flank.

Then move the ring gear toward the pinion to

correct the backlash.

(c) Pattern D indicates excessive contact at

the heel of the tooth. To correct this, move the ring

gear toward the pinion. Then remove shims to

move the pinion away from the ring gear for correct

backlash.

(d) Pattern E indicates excessive contact at

the face of the tooth. To correct this, add shims to

bring the pinion toward the ring gear until the

contact covers the flank of the tooth without

breaking contact at the face. Move the ring gear

away from the pinion to correct the backlash.

ME 3930-624-34/4-16

Figure 4-16. Differential tooth pattern.

4-16