Pinion Gear: Service and Repair

Fig. 3 Installing drive pinion bearing races. Conquest:

1. Press drive pinion front and rear bearing outer races into gear carrier.
2. Adjust drive pinion height as follows:
a. Install tool C-462b and drive pinion front and rear bearing into the gear carrier. Apply a thin coat of suitable grease to face of washer on tool.
b. Tighten nut on tool and measure drive pinion preload, which should be within specifications without oil seal installed. Loosen or tighten nut as necessary to bring preload within specifications.

Fig. 4 Measuring drive pinion height. Conquest:

c. Position cylinder of tool MB990552 in side bearing seat of gear carrier.
d. Using a feeler gauge, measure clearance between the two tools and select drive pinion rear shim(s) corresponding to this measurement.
e. Install shim(s) to drive pinion, then press rear bearings onto pinion.
3. Adjust drive pinion preload as follows:
a. Install drive pinion front shim(s) between drive pinion spacer and front bearing inner race.

Fig. 1 Exploded view of conventional differential. Conquest:

Fig. 2 Exploded view of limited slip differential. Conquest:

b. Torque spline coupling retaining nut to specifications, then measure drive pinion preload, without oil seal, as described in step 2.
c. Adjust preload, as necessary, by replacing drive pinion front shim(s) or spacer.
4. Remove spline coupling and drive pinion, then drive seal into place using suitable seal installer.
5. Install spline coupling and drive pinion assembly with reference marks aligned. Torque spline coupling retaining nut to specifications. Apply a thin coat of suitable grease to spline coupling washer mating surface before installing drive pinion assembly.
6. Using suitable inch lb. torque wrench, measure drive pinion preload. If not within specifications, replace shim(s) or spacer as necessary.

Fig. 5 Measuring spline coupling runout. Conquest:

7. Measure spline coupling runout using suitable dial indicator. Runout should measure 0.004 inch, or less. If not, disassemble differential carrier and change position of spline coupling and drive pinion, then recheck runout.