Axle Vent Replacement (12-Inch Ring Gear-Full Floating A X; Axle Shaft Replacement (12-Inch Ring Gear-Full Floating A X - GMC 1986 P-Truck Service Manual

4. Propeller shaft. Refer to PROPELLER SHAFT
(SEC. 4A).
AXLE VENT REPLACEMENT
(12-INCH RING GEAR-FULL
FLOATING AXLE)
A threaded type axle vent is used on the
Rockwell 12-inch ring gear axle and must be
replaced if the vent cap is damaged or missing.
Clean
The area around the axle vent.
Remove or Disconnect
0
Axle vent from the housing.
Install or Connect
0
Axle vent to the housing.
AXLE SHAFT REPLACEMENT
(12-INCH RING GEAR—FULL
FLOATING AXLE)
Raise the vehicle and place jack stands under
the frame side rails.
«"► Remove or Disconnect (Figure 29)
Tools Required:
J-2619-01 Slide Hammer
J-8117 Axle Shaft Puller Adapter
1. Bolts (70) and washers (71).
2. Hub cap (72).
• Thread J-8117 into the tapped hole on the axle
shaft (74) flange.
• Attach J-2619-01 to J-8117.
3. Axle shaft (74) using J-2619-01.
Old gasket material from the hub (
cap (72) and the axle shaft (74) flange and mating
surface in the hub (
0
Install or Connect (Figure 29)
Tools Required:
J-2619-01 Slide Hammer
J-8117 Axle Shaft Puller Adapter
1. Axle shaft (74).
) and hub
86
).
86
REAR AXLE 4B-21
• Tap the axle shaft (74) into position using
J-8117 and J-2619-01.
• Index the axle shaft (74) splines into the hub
( ) splines.
86
2. Gasket (73).
3. Hub cap (72).
4. Washers (71) and bolts (70).
BEARING ADJUSTMENT (12-INCH
GEAR—FULL FLOATING AXLE)
• Make sure the brakes are fully released and do
not drag.
• Check the wheel bearing play by grasping the tire
at the top and pulling and pushing back and forth,
or by using a pry bar under the tire. If the wheel
bearings are properly adjusted, movement of the
hub or disc will be barely noticeable. If the
movement is excessive, adjust the bearings.
0
Remove or Disconnect (Figure 29)
Tool Required:
J-25510 Wheel Bearing Nut Wrench
• Raise the vehicle until the wheel is free to
spin.
1. A xle s h a ft (74).
Replacement."
2. Nut (90) using J-25510.
• Release the tang.
3. Lock washer (89).
Adjust
Nut ( ) using J-25510. Tighten the nut (
8 8
while the hub is rotating to
lbs.). Make sure the bearing surfaces are in
contact and then back the nut (
turn.
|-n-| Install or Connect (Figure 29)
1. Lock washer (89).
• Bend a tang over a flat of the adjusting nut
88
( ).
2. Nut (90) using J-25510.
• Tighten the nut (90) to 339 N m (250 ft. lbs.).
• Bend a long tang of the lock washer (89)
over a flat of the nut (90).
3. A xle s h a ft (74).
Replacement."
• Lower the vehicle.
R efer to " A xle S ha ft
88
N m (50 ft.
68
) off 1 /s
88
R efer to " A xle S ha ft
)