GMC 1990 Light Truck Repair Manual page 326

4C5-10 L-VAN FRONT AXLE
Figure 22— Installing the Sleeve Bearing
A. Four Bolts
Figure 24— Carrier Case Bolts installed
29. Carrier Case
32. Sleeve
A. Mark Location on the Case
Figure 25—Marking Sleeve Location
6. Four bolts (28) (figure 24).
• Bolts (28) to 50 N-m (37 ft. lbs.).
ADJUSTING 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
1. Tighten the right sleeve (32) to 140 N-m (100 ft.
lbs.). Use J 33792 (figure 23).
2. Tighten the left sleeve (32) to 140 N-m (100 ft.
lbs.). Use J 33792 (figure 23).
3. Mark the location of the adjusting sleeves in rela­
tion to the carrier halves (figure 25), so the
notches in the adjusting sleeves can be counted
when turned.
4. Turn the right adjusting sleeve OUT two notches
using J 33792.
5. Turn the left adjusting sleeve IN one notch using
J 33792.
6. Rotate the pinion several times to seat the bear­
ings.
7. Install J 34047, J 25025-1 and J 8001-1 (figure
26).
8. Place the indicator stem at the heel end of a
tooth.
9. Check and record the backlash at three or four
points around the ring gear.
• The pinion must be held stationary when
checking backlash.
• The backlash should be the same at each
point within 0.05 mm (0.002-inch). If the back­
lash varies more than 0.05 mm (0.002-inch),
check for burrs, a distorted case flange,
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uneven bolting conditions, or foreign matter
between the case and the ring gear.
• Gear backlash should be between 0.08-0.25
mm (0.003-0.010-inch) with a preferred specifi­
cation of 0.13-0.18 mm (0.005-0.007-inch).
29
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