Chevrolet 1977 light duty truck Service Manual page 349

Fig. 4A 30 Removing C entering Ball
Fig. 4 A -3 1 -In s ta llin g C entering Ball
LU B R IC A T IO N
T he front axle p rop sh aft found on all four-wheel
drive trucks requires special lubrication procedures at
two locations: The C /V joint, and the slip yoke.
All Constant Velocity Joints (C /V )
The constant velocity (C /V ) joint, located at the
transfer case end o f the front propshaft. must be
lubricated periodically with special lubricant,
or equivalent. If the fitting cannot be seen from beneath
the vehicle Figure 4A-34 shows how the fitting may be
lubricated from above the C /V joint, with a special
adapter J-25512-2 on the end of a flex hose.
Slip Spline
• Dana Style Propshaft-
grease cap. shown in Figure 4A-35 and slide the collar
back to reveal the sealing area. Apply chassis lubricant
at the fitting until grease begins to leave through the
vent hole. Cover the vent hole with your finger and
continue applying lubricant until it can be seen leaving
at the slip yoke seal. Reinstall the grease cap.
1050679,
the fitting until grease begins to leave through the vent
hole.
First loosen the screw-on
Fig. 4A-32 In sta llin g Centering Ball Seal
Fig. 4A-33-Reassem bling Flange Yoke
NOTE: 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.
W hen installing the propshaft to transfer case
attaching bolts, torque to specification (20-30 ft.
lbs.).
• GM Style Propshaft-
NOTE: If the slip spline is dry or corroded, it may
be necessary to disconnect the propshaft from the
Apply chassis lubricant at