Differential Case Installation; Adjusting B Acklash - GMC T Series 1994 Repair Manual

Figure 19— Installing the Pinion Bearing
Figure 21— Measuring Pinion Bearing Preload
7. Deflector (43), flange (44), washer (45) and nut
(46).
A. Apply PST sealant (GM P/N 1052080) or equiv­
alent to the pinion gear threads and both sides
of the washer.
B. Tighten nut (46) until no end play is detectable
while holding the flange (44) with J 8614-01
(figure 9).
C. No further tightening should be attempted until
bearing preload has been checked.
Measure
• Pinion bearing preload. Use an inch pound torque
wrench (figure 21). The correct preload is 1.7-2.8
N-m (15-25 lbs. in.).
1. Rotate the pinion with the torque wrench and
observe the reading.
2. If the preload torque is below specifications, contin­
ue torquing the pinion nut in small increments.
Check the preload after each tightening. Each tight­
ening increases the bearing preload by several
inch pounds. If the bearing preload is exceeded,
the pinion will have to be removed, and a new
collapsible spacer installed.
3. Once the preload has been obtained rotate the pin­
ion several times to make sure that the bearings
have seated. Recheck the preload, and adjust if
necessary.
DIFFERENTIAL CASE
INSTALLATION
■H- Install or Connect (Figures 1, 2, and 22
through 25)
Tools Required:
J 33788 Bearing Installer
J 23423-A Bearing Cup Installer
J 33792 Side Bearing Adjuster Wrench
1. Bearing (30) into the sleeve (32) using J 33788
(figure 22).
2. Sleeves (32) into the carrier case (29). Thread in
all the way.
3. Side bearing cups (33) to the carrier case (29)
using J 23423-A.
4. Differential to the case.
A. Place the differential (35) into the case half
which contains the pinion gear.
B. Turn the left sleeve (32) in toward the differen­
tial case using J 33792 until backlash is felt
between the ring and pinion gear.
5. Carrier case halves (29). Do not use any sealer at
this time.
• If the carrier halves do not make complete con­
tact, back out the right hand adjusting sleeve
(32). Use J 33792 (figure 23).
NOTICE: Refer to "Notice" on page 4C3-1.
6. Four bolts (28) (figure 24).
Tighten
$
• Bolts (28) to 50 N.m (37 lbs. ft.).
A D JU STIN G BACKLASH
Tools Required:
J 33792 Side Bearing Adjuster Wrench
J 34047 Dial Indicator Adapter
J 25025-1 Dial Indicator Stand
J 8001-1 Dial Indicator Clamp