9-5. DIFFERENTIAL REPLACEMENT (Cont'd)
New configuration (P/N 12338415-3) differentials are provided with
a pinion yoke and slinger installed. Four O-rings and three locknuts
are also provided, but not installed. Output flanges are not provided.
No modification to service differential is required when replacing
rear differential on vehicles with serial numbers USBL Eff. 44825
If service differential is replacing a front differential, the service
yoke must be replaced and the slinger removed.
If service differential is replacing a rear differential on vehicles with
serial numbers USBL Eff. 44825 and below, the service yoke must
be replaced with a flange.
Perform step 1 for front and rear differential installation.
Measure torque required to rotate pinion yoke (3) on service differential (1) and record.
Perform steps 2 through 5 for front differential only.
If necessary, remove locknut (4) and pinion yoke (3) from old differential (1). Discard locknut (4).
Remove locknut (4) and pinion yoke (3) from service differential (1). Remove slinger (2). Discard
Install new pinion yoke (3) and locknut (4) on service differential (1).
Tighten locknut (4) in small increments, until torque required to rotate pinion yoke (3) exceeds
original measurement (step 1) by 2 lb-in. (0.2 Nm).
For rear differentials, apply sealing compound to differential (1) tapped holes. Install two brake
caliper adapters (16) on differential (1) with four capscrews (15). Tighten capscrews (15) to 110-140
lb-ft (149-190 Nm).
If removed, installation of new configuration side mounting brackets (6) is recommended, refer
Raise differential (1) into place and connect vent line (17).
Apply a liberal amount of thread sealing compound to the tapped
holes of differential. To allow adequate coating of threads, install
capscrews shortly after applying thread sealing compound. Failure to
do this could allow capscrews to loosen and cause damage to
Apply sealing compound to differential (1) tapped holes. Install capscrews (8), washers (7), and
differential (1) on side mounting brackets (6).
Perform step 10 if replacing front differential.
Install mounting bracket (9) on frame crossmember (24) with two washers (23), capscrews (22),
washers (23), and locknuts (25). Tighten locknuts (25) to 90 lb-ft (122 Nm).
Washers are not required when securing front differential to mounting
Apply sealing compound to capscrews (11). Install two capscrews (11), washers (10), and differ-