Wheels: hubRecall 77V-172 · Chevrolet and GMC vehicles
GENERAL MOTORS CORP. recall 77V-172 covers 685 Chevrolet and GMC vehicles for a wheels: hub problem, reported to NHTSA on October 12, 1977.
Source: NHTSA recall 77V172000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
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.
The fix
DEALER WILL INSPECT AND REPLACE FRONT AXLE ALUMINUM HUBS WITH STEEL HUBS, WITHOUT CHARGE TO OWNER.
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
Vehicles in this recall
Built from March 1, 1976 to June 1, 1977. Not every vehicle in these model years is included; check by VIN.