NHTSA Recall 77V172000
NHTSA Campaign Id 77V172000; Date: Oct. 12, 1977
Recalled Vehicles:
1976 Chevrolet D; 1977 Chevrolet D; 1976 Chevrolet F; 1977 Chevrolet F; 1976 Chevrolet J9500; 1976 Chevrolet M; 1977 Chevrolet M; 1976 GMC D; 1977 GMC D; 1976 GMC F; 1976 GMC J9500; 1977 GMC J9500; 1976 GMC M; 1977 GMC M9500; 1976 GMC N9500; 1977 GMC N9500
Component: Wheels:cap/cover/hub
Manufactured by: General Motors Corp.
Affected Units:: 685
Recall Summary:
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.
How to Fix:
Dealer will inspect and replace front axle aluminum hubs with steel hubs, without charge to owner.
Recall 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.
Date Owners notified by Manufacturer: Oct 31, 1977
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