GMC T Series 1994 Repair Manual page 816

Figure 18— Countershaft Bearing Cap Installation
Measure
Mainshaft end play (figure 19).
A. Set the dial indicator up on the end of the main­
shaft.
B. Use screwdriver or equivalent to lift mainshaft
up and down to measure end play.
C. Mainshaft end play should be 0.05-0.15 mm
(0.002-0.006 in.j.Adjust by adding or removing
shim(s) (141) under bearing retainer plate (140).
D. Remove bolts and apply Loctite® Dri-Loc 201
or equivalent to the bolts and retorque.
23. Vibration damper (30) using J 39314 (figure 20)
(4WD models only).
• Move synchronizer sleeves to lock transmission
into two gears at once.
24. Mainshaft washer (31) and nut (32) using J 38805
(figure 21) (4WD models only).
Tighten
&
• Nut (32) to 441 N-m (325 lbs. ft.).
25. Rear oil retainer (18, 23, or 29).
26. Retainer bolts (33).
&
Tighten
• Bolts (33) to 54 N-m (40 lbs. ft.).
27. Yoke assembly (26) (2WD models only).
28. Spline seal, washer (27), and nut (28) (2WD mod­
els only).
Tighten
Figure 20— Vibration Damper Installation (4WD
Models)
Figure 21—Vibration Damper Installation (4WD
Models)