The 1974 Mack Fs has 5 NHTSA recall campaigns affecting an estimated 49,426 vehicles. Recall repairs are always free at any authorized dealer. Last updated July 5, 2026.
THE FLEX BLADE FANS ON THE INVOLVED VEHICLES MAY DEVELOP CRACKS IN THE LAMINATED STIFFENER AS A RESULT OF FATIGUE DURING OPERATION. IF SUCH A CONDITION EXISTS AND THE CRACKS GO UNDETECTED, CONTINUED OPERATION COULD CAUSE PIECES OF THE STIFFENER TO BREAK OFF.
DEALER WILL REPLACE THE ORIGINAL FAN WITH A STEEL FIXED BLADE FAN, FREE OF CHARGE.
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 Fs as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.