The 1974 Mack Rs has 7 NHTSA recall campaigns affecting an estimated 76,211 vehicles. Recall repairs are always free at any authorized dealer. Last updated July 5, 2026.
IN THE INVOLVED TRUCKS IT IS POSSIBLE THE ADJUSTABLE STEERING COLUMN REAR MOUNTING BRACKET COULD FAIL, ALLOWING STEERING WHEEL ASSEMBLY TO FALL DOWN ONTO THE OPERATOR"S LAP.
DEALER WILL INSTALL AN ADDITIONAL BRACKET IN THIS AREA TO PREVENT THE STEERING WHEEL FROM DISLOCATING IN THE EVENT OF A BRACKET FAILURE.
AN AXLE "NO BRAKE" CONDITION COULD RESULT FROM AN EATON CONTROLLER INTERNAL ELECTRICAL MALFUNCTION. THIS CONDITION MAY CAUSE THE ANTI-WHEEL LOCK VALVE SOLENOID TO BE CONTINUOUSLY ENERGIZED AND PREVENT THE BRAKES FROM BEING APPLIED ON ONE OF THE AXLES. AS A RESULT, THE ANTI-WHEEL LOCK WARNING LAMP IS NOT ACTIVATED.
THE DEALER WILL INSPECT AND, IF NECESSARY, REPLACE THE ANTI-WHEEL LOCK CONTROLLER WITHOUT CHARGE TO OWNER.
MACK CAMPAIGN NO SCO-63.TRUCKS MFG'D DEC.12, 1974 THRU JUNE 30, 1975.POSSIBILITY THAT THE TRAILER SUPPLY CONTROL VALVE EXHAUST PORT WAS INADVERTENLYPLUGGED, AND THE SAFETY VALVE ON THE AIR RESERVOIR MAY HAVE BEEN OMITTED.IFTHIS CONDITION EXISTS IT COULD LEAD TO INTERMITTENT LOCKUP OF THE TRAILERBRAKES AND DIFFICULTY…
MACK CAMPAIGN NO K1006.TRUCKS WITH PERLUX LAMPS MFG'D NOV.15, 1973 THRUJAN.2, 1975.POSSIBILITY THAT PERLUX ROAD LAMPS CIRCUIT WAS WIRED PARALLELWITH THE HEADLAMPS.THIS RESULTED IN AN ELECTRICAL OVERLOAD AND CAUSED THECIRCUIT BREAKER TO CYCLE OR "TRIP", CAUSING MOMENTARY LOSS OF FORWARDILLUMINATION.(CORRECT BY…
MACK CAMPAIGN NO N/A.TRUCKS MFG'D APRIL 1, 1974 THRU NOV.15, 1974.POSSIBILITY THAT ON MODELS WITH OUTBOARD-MOUNTED BRAKE DRUMS AND STEEL DISCWHEEL ON ALUMINUM WHEEL HUBS, THE MANUFACTURING TOLERANCES MAY CAUSE ANINTERFERENCE PROBLEM BETWEEN THE INSIDE PORTION OF WHEEL AND OUTER EDGE OF CASTDRUM.THIS CONDITION RESULTS…
MACK CAMPAIGN NO 56.MODEL WITH SWS56, SWS57, SWS76 SERIES BOGIES, ALUMINUMHUBS AND DISC REAR WHEELS.BUILT 7/15 74 THRU 11/14 74.POSSIBILITY THATINCORRECT STUDS WERE USED TO ATTACH DISC REAR WHEELS TO ALUMINUM HUBS.IF THISOCCURS, THE STUDS WILL LOOSEN AND RESULT IN FAILURE OF THE HUB,DRUM OR WHEELAND COULD LEAD TO…
MACK CAMPAIGN NO SCO44.WITH RIM ASSEMBLY 14QJ19305.TRUCKS.POSSIBILITYTHAT THE INCORRECT BASE RIMS OR SIDE RINGS OF THE WHEEL ASSEMBLY MAY HAVE BEENINSTALLED.THE OPERATION OF VEHICLES WITH INCORRECT SIDE RING OR BASE RIMCOULD LEAD TO LOSS OF VEHICLE CONTROL.RIM SEPARATION COULD OCCUR WHEN VEHICLEIS NOT IN OPERATION…
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 1974 Mack Rs as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.