GMC 1982 Light Duty Truck Service Manual page 407

PROPELLER SHAFT
The rear universal joint to propshaft bolt on some
models requires a # 1 0 "Six Lobed Socket" (J-33051), for
proper removal and installation.
Removal
1. Raise vehicle on hoist. M ark relationship of shaft to
companion flange and disconnect the rear universal
Fig. 4A -7~P roper Alignm ent
ON-VEHICLE SERVICE
joint by removing trummion bearing " U " bolts or
straps. T ape bearing cups to trunnion to prevent
dropping and loss of bearing rollers.
2. For models with two-piece shafts remove bolts
retaining bearing support to hanger.
3. Slide propeller shaft forward disengaging trunnion
disengaging from transmission.
transmission or transfer case use same removal
procedure as above.
Universal Joints
im portant
dissassembly for proper phasing.
joints are of the extended-life design and do not require
periodic inspection or lubrication; however, when these
joints are disassembled, repack bearings and lubricate
reservoir at end of trunnions with high-melting point wheel
bearing lubricant. Use care not to damage or dislodge seals
from trunnion.
Snap Ring Type
Disassembly
1. Remove bearing lock rings from trunnion yoke.
2. Support trunnion yoke on a piece of 31.75 mm (1 -1 /4 " )
I.D. pipe on an arbor bed.
Due to length of the propeller shaft it may be more
convenient to use a bench vise, for removal and
installation, instead of an arbor press. In this case,
proceed with disassembly and assembly procedure as
with an arbor press Fig. 4A-8 and 4A-9.
3. Using a suitable socket or rod, press on trunnion until
bearing cup is almost out. Grasp cup in vise and work
cup out of yoke. See figures 4A-8 and 4A-9. The
bearing cup cannot be fully pressed out.
from axle flange, then slide assembly rearw ard
For models using strap or U-bolt a tta c h m e n ts to
On models with between center slip propshaft it is
th a t components
Except for P models with disc brakes, the universal
Fig. 4A-8--Bearing Cup Removal with Vise
PROPELLER SHAFT 4 A -5
are marked prior to