The 1975 Mack Rs has 7 NHTSA recall campaigns affecting an estimated 75,777 vehicles. Recall repairs are always free at any authorized dealer. Last updated July 6, 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.
A DESIGN DEFICIENCY EXISTS IN THE AIR DRYER PIPING IN THE AREA OF THE PRESSURE RELIEF VALVE AND COMPRESSOR GOVERNOR CONTROL LINK. MOISTURE IS PASSED AND BUILDS UP IN THIS RELIEF VALVE AND CONTROL LINE. IN FREEZING AMBIENT TEMPERATURES, THIS MOISTURE MAY FREEZE, ALLOWING THE CHASSIS AIR SYSTEM PRESSURE TO EXCEED 150…
THE DEALER WILL RELOCATE THE AIR SYSTEM COMPRESSOR GOVERNOR LINE AND PRESSURE RELIEF VALVE TO ELIMINATE MOISTURE ACCUMULATION.
MACK CAMPAIGN NO SC072.TRUCKS EQUIPPED WITH EATON SKID CONTROL SYSTEM ANDROCKWELL INTERNATIONAL FF931 OR FL931 W FRONT AXLES WITH ALUMINUM WHEEL HUBS.POSSIBILITY THAT FULL ADJUSTMENT OF THE WHEEL SPEED SENSOR CANNOT BE OBTAINEDWITH THE PRESENT EATON WHEEL SPEED ROTOR.IF THIS RESULTS IN INTERFERENCEBETWEEN THE ROTOR…
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 SCO-61.TRUCKS.POSSIBILITY THAT THE REINFORCEMENT INSERTSPECIFIED IN CONNECTOR USED WITH SYNFLEX HOSE MAY HAVE BEEN OMITTED.THISCONDITION COULD RESULT IN INADEQUATE RETENTION OF THE HOSE TO THE CONNECTOR ANDCOULD ALLOW HOSE TO DISCONNECT DURING BRAKE APPLICATION, CAUSING LOSS OFBRAKING ON THE AFFECTED…
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…
Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 1975 Mack Rs as of July 6, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.