GMC 1982 Light Duty Truck Service Manual page 414

4 A -1 2 PROPELLER SHAFT
Fig. 4A-28--lnstalling Centering Ball Seal
Propeller Shaft
To Rear A xle (Strap)
Bearing Support-to-Hanger
Hanger-to-Frame
To Transfer Case
Torque Specifications (Ft.-Lbs.)
*T orque Spec, is fo r Hex Head B olt, if Straps are Retained w ith Six Lobe B olt,T orque to 22 to 30 Ft. Lbs.
LUBRICATION
The front axle propshaft found on all four-wheel drive
trucks requires special lubrication procedures at two
locations: The C /V joint, and the slip yoke.
Constant Velocity Joints (C/V)
The constant velocity ( C /V ) joint, located at the
transfer case end of the front propshaft, must be lubricated
periodically
# 1050679, or equivalent. If the fitting cannot be seen from
beneath the vehicle Figure 4A-30 shows how the fitting may
be lubricated from above the C /V joint, with a special
adapter J -2 5 5 12-2 on the end of a flex hose.
Slip Spline
Apply chassis lubricant at the fitting until grease
begins to leave through the vent hole.
If the slip spline is dry or corroded, it may be necessary
to disconnect the propshaft from the truck, remove the slip
yoke, and wire brush the affected areas. Wipe clean before
reinstallation. When installing the propshaft to transfer case
front output flange attaching bolts, torque to specification
95-110 N-m (70-80 ft. lbs.).
SPECIFICATIONS
PROPELLER S H AFT
CK
12-17*
20-30
40-50
70-80
Fig. 4A-29--Reassembling Flange Yoke
(see Section 0) with special
G
12-17*
20-30
—
-
lubricant,
P
12-17
20-30
—
-
1 0 1 9 7 0