1976 GMC F WHEELS:CAP/COVER/HUB

1976 GMC F WHEELS:CAP/COVER/HUB (Change Vehicle)

The following WHEELS:CAP/COVER/HUB recall/defect on 1976 GMC F vehicles was reported to the National Highway Traffic Safety administration on 1977-10-12. For more information contact the National Highway Traffic Safety administration or the US Department of Transportation. See recall summary below.

Build Years/Makes/Models:	1976 CHEVROLET J9500 1976 - 1977 CHEVROLET F 1976 - 1977 CHEVROLET D 1976 - 1977 CHEVROLET M 1976 - 1977 GMC J9500 1977 GMC M9500 1976 GMC F 1976 GMC M 1976 - 1977 GMC D 1976 - 1977 GMC N9500
UNits affected:	685
Recall Number:	77V172000
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.
Consequence:
Remedy:	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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