Final Assembly - GMC T Series 1994 Repair Manual

The position of the drive pinion is adjusted by
increasing or decreasing the shim thickness between
the pinion head and the inner race of the rear bearing.
The shim is used in the differential to compensate for
manufacturing tolerances. Increasing the shim thickness
will move the pinion closer to the centerline of the ring
gear.
Backlash is adjusted by the side bearing adjusting
sleeves which move the case and ring gear closer to, or
farther from, the pinion. (The adjusting sleeves are also
used to set side bearing preload.) To increase backlash,
turn the left sleeve in, and the right sleeve out, an
identical amount. To decrease backlash, turn the right
sleeve in, and left sleeve out, an identical amount.
It is critical that the contact pattern be centrally locat­
ed up and down on the face of the ring gear teeth.

FINAL ASSEMBLY

I+ + I Remove or Disconnect (Figures 1 and 2)
1. Four case bolts (28).
2. Right carrier case half.
Clean
• Sealing surfaces on the carrier case halves.
Remove all oil and grease. Use a chlorinated sol­
vent, such as carburetor cleanej.
+4* Install or Connect (Figures 1, 2, 29, and 30
through 33)
NOTICE: For steps 3, 4, 6, and 22, refer to
"Notice" on page 4C1-1.
Tools Required:
J 33844 Bearing Installer
J 33893 Axle Seal Installer
J 33799 Shift Housing Seal Installer
J 33842 Differential Pilot Bearing Installer
J 33791 Case Bushing Installer
1. Apply a bead of sealer (GM P/N 1052357)
equivalent) to one carrier case surface.
2. Right carrier case (29).
3. Bolts (28).
• Bolts to 47 N-m (35 lbs. ft.).
• Make sure the sleeves (32) are in the proper posi­
tion, as marked previously.
4. Bolts (18) and locks (19).
Tighten
&
• Bolts to 8.0 N-m (70 lbs. in.).
5. Left seal (3) to the cover (57). Fully support the
seal bore area of the cover while installing the seal.
IJJ* Clean
• All oil and grease from the cover and carrier
sealing surfaces. Use carburetor cleaner or
equivalent.
•A pply sealer (GM P/N 1052357) or equivalent)
to the cover.
6. Cover (57) and bolts (58).
or
Figure 30— Installing the Shift Housing Seal
F1665