1976 CHEVROLET M Recall

Campaign:

77V172000 on 10/11/1979

Component:

Wheels:cap/cover/hub

Manufactured:

02/29/1976 - 05/31/1977

Affected:

685

Defect:

The front axle aluminum hubs on the involved vehicles may contain a deficiency in the barrel area between the inner and outer bearings which may result in cracks which could eventually lead to hub failure.

Correction:

Dealer will inspect and replace front axle aluminum hubs with steel hubs, without charge to owner.

Notes:

Vehicle description: heavy trucks equipped with ff931 front axles and motorwheel aluminum front hubs.system: wheels; aluminum hubs.consequences of defect: when hub failure occurs, the separated hub is retainedon the axle spindle by the wheel bearing adjusting nuts. continued vehicleoperation after a hub separation can result in 1) brake assembly lockup andconsequent loss of vehicle control, 2) excessive heat generation resulting fromthe brake line touching the brake drum which will cause a tire blowout and 3)progressive damage to the hub which would allow the hub, wheel, and tire tobecome disengaged from the vehicle.note: initial hub separation may be accompanied by a distinct sound at themoment of separation, along with thumping or wheel wobble.

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