Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Wheel Hub (Locking): Service and Repair
Warner Auto. Locking Hub
Fig. 6 Exploded view of Warner automatic locking hub
Description
The Automatic Locking Hub, shown in Fig. 6, engages or disengages to lock the front axle shaft to the hub of the front wheel. Engagement occurs
whenever the vehicle is operated in 4WD. Disengagement occurs whenever 2WD has been selected and the vehicle is moving rearward. Disengagement
will not occur when the vehicle is moved rearward if 4WD is selected and the hub has already been engaged.
Before disassembling a unit for a complaint of abnormal noise, note the following:
1.
To obtain all-wheel drive, the transfer case lever must be placed in 4L or 4H, at which time the hub locks will automatically engage.
2.
To unlock the hubs, shift the transfer case lever to 2H, then slowly reverse the vehicle direction approximately 10 feet.
3.
An incomplete shift from 2WD to 4WD, or disengagement of only one hub lock may cause an abnormal sound from the front axle. Shift to 4WD
to stop the noise, then unlock the hubs as previously stated.
Removal
