GMC chervolet camaro 1999 Service Manual page 447

4-32 Rear Drive Axle
1
Drive line/Axle
Drive Pinion Installation Procedure
Tools Required
J 7817 Front Pinion Bearing Cup Installer
1. If a ew ring gear and a new drive pinion gear will
be installed, measure the differential drive pinion
gear depth. Refer to Pinion Depth Adjustment.
2. Install the drive pinion gear into the rear axle
housing.
3. Use J 7817 in order to install the new drive pinion
gear seal (1 ).
4. Apply pipe sealant (GM P/N 12346004) or an
equivalent onto the pinion shaft splines.
5. Install the drive pinion gear yoke.
6. Install the drive pinion gear washer and nut.
Finger tighten the drive pinion gear
washer and nut.
7. Perfom the following actions in order to tighten
the drive pinion gear nut.
164048 •
Hold the drive pinion gear yoke in place.
• Rotate the drive pinion gear in order to seat
the inner and outer drive pinion gear
bearings.
• While rotating the drive pinion gear, tighten the
drive pinion gear nut until the end play is
taken up.
Important:
• Preloa specifications are being approached when
the following conditions occur: (
- The holder will no longer pivot freely as the
drive pinion gear rotates.
- No further end play exists
Do nt attempt further tightening until after
measuring the preload if the above
conditions exist.
• Exceeding the preload specifications will compress
the collapsible drive pinion gear bearing spacer
too far.
8. Set the preloa to the following specifications on
the inner and outer drive pinion gear bearings:
• 1.7-3.4 N·m (15-30 lb in) on new inner
and outer drive pinion gear bearings
• 1.0-1.7 N-m (10-15 lb in) on used innerand
outer drive pinion gear bearings
9. Rotate te drive pinion gear several times.
Ensure that the inner and outer drive pinion gear
bearings seat.
10. Carefully tighten the drive pinion gear nut.
11. Continue to gradually tighten the drive pinion
gear nut.
Measure the preload after each tightening.
(Additional tightening of the drive pinion gear nut
may add additional torque.
12.
Measure the preload again.
13. Reset the preload to specifications if the preload
decreased by rotating the drive pinion gear. (
14. nstall the differential case. Refer to Rear Axle ·
Assemble.