RecallMyCar

Mack Wl Recalls & Complaints by Model Year

NHTSA lists 22 safety recalls and 0 owner complaints across 10 model years of the Mack Wl (1972–1981).

22
safety recalls, all years
0
owner complaints, all years
1975
year with most recalls

Pick your Mack Wl model year

Model yearRecallsComplaints
1981 Mack Wl10
1980 Mack Wl10
1979 Mack Wl40
1978 Mack Wl50
1977 Mack Wl80
1976 Mack Wl80
1975 Mack Wl130
1974 Mack Wl70
1973 Mack Wl10
1972 Mack Wl10

All Mack Wl recalls (22)

Every NHTSA safety campaign that lists a Mack Wl, most recent first, with the model years each one covers.

  1. Shaft pitman (steering)

    NHTSA 83V041000 Reported 1,515 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The pitman arm, a lever that transmits turning movements from the steering gear to the steering linkage, may loosen or break at its connection to the steering linkage. The failure can prevent turning attempts from having any effect. The defect is caused by incorrect assembly of the ball stud connection in the pitman arm.

    Remedy: The dealer will install a new pitman arm ball assembly at no charge.

    Model years: 1980, 1981

  2. Leaf spring assembly (suspension)

    NHTSA 79V171000 Reported 1,706 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The spring seat plate, located between the axle housing and the suspension springs, may deform due to spring bending. As a result, the clamping force in the assembly may be reduced. Loss of clamping force could cause spring failure and the axle will dislocate. Also, the tire could come into contact with the spring.

    Remedy: The dealer will replace the existing spring seat with a newly fabricated seat which is welded to the housing. An improved spring clamping plate and new springs will also be installed without charge.

    Model years: 1979

  3. Steering wheel/handle bar (steering)

    NHTSA 79V164000 Reported 4,640 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The flange head pinch bolts used in the yokes of the steering shaft assemblies may have been overstressed due to the bolts not being tightened to specifications. As a result, the pinch bolts could break while in service.

    Remedy: Flange head pinch bolts will be replaced with standard grade 8 fasteners without charge to owner.

    Model years: 1979

  4. Linkages (steering)

    NHTSA 79V137000 Reported 6,673 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The pitman arm retaining nut may not have been torqued to manufacturer specifications. This could result in inadequate retention of the nut at the output shaft, allowing the pitman arm to become loose.

    Remedy: Dealer will inspect and retorque pitman arm, if necessary, at no cost to owner.

    Model years: 1977, 1978, 1979

  5. Engine (engine and engine cooling)

    NHTSA 79V133000 Reported 23,000 vehicles potentially affected MACK TRUCKS, INCORPORATED

    In the event of turbocharger compressor wheel failure, one or more of the four capscrews that hold the turbocharger together may be struck by parts of the compressor wheel, resulting in the capscrews being damaged. If these capscrews are damaged to the point that they allow the compressor back plate to dislocate from the turbocharger…

    Remedy: Dealer will install a shield for the heads of the four capscrews, along with stronger sae 8 grade 8 capscrews, if necessary, at no cost to owner.

    Model years: 1977, 1978, 1979

  6. Interconnecting assembly(wiring) (service brakes)

    NHTSA 78V210000 Reported 19,370 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Delays of up to about 2 seconds may exist in the brake application times to the brakes on the bogie axles in the presence of certain types of wheel speed sensor signal discontinuities or distortions that may occur as a result of sensor wire failure. This constitutes a non-compliance to federal motor vehicle safety standard no. 121, "air…

    Remedy: Dealer will install new wheel speed sensors that incorporate improved wiring and the present bogie anti-wheel lock system will be changed to an axle-to-axle system for improved reliability.

    Model years: 1977, 1978

  7. Engine (engine and engine cooling)

    NHTSA 78V170000 Reported 850 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The possibility exists that the aluminum engine rear support brackets may fail due to metal fatigue. This type of failure would allow the engine and transmission assembly to dislocate downward. This will result in throttle control loss with the engine operating continuously in the mid to upper range of the governed speed range.

    Remedy: Dealer will inspect and, if necessary, replace aluminum support brackets with brackets made from ductile iron for increased strength.

    Model years: 1975, 1976, 1977, 1978

  8. Service brakes, air: control unit/module

    NHTSA 78V068000 Reported 9,700 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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.

    Remedy: The dealer will inspect and, if necessary, replace the anti-wheel lock controller without charge to owner.

    Model years: 1974, 1975, 1976

  9. Hoses, lines/piping, and fittings (service brakes)

    NHTSA 78V030000 Reported 400 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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 PSI. Excessive air…

    Remedy: The dealer will relocate the air system compressor governor line and pressure relief valve to eliminate moisture accumulation.

    Model years: 1975, 1976, 1977, 1978

  10. Hanger/bracket (suspension)

    NHTSA 77V205000 Reported 7,400 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A deficiency exists in the welds securing the rear spring insulator bracket to the axle housing. This is due to improper positioning of the weld, in relationship to the bracket and axle housing. Failure of the welds would cause separation of the spring insulator bracket and the axle housing, resulting in improper alignment of the…

    Remedy: Dealer will reweld the insulator spring bracket at no cost to owner.

    Model years: 1977

  11. Fan (engine and engine cooling)

    NHTSA 77V173000 Reported 48,000 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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.

    Remedy: Dealer will replace the original fan with a steel fixed blade fan, free of charge.

    Model years: 1972, 1973, 1974, 1975, 1976, 1977

  12. Multi piece (wheels)

    NHTSA 77V149000 Reported 250 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The front wheel aluminum hubs on the involved vehicles may be subject to cracks which may progress circumferentially around the barrel of the hub. This could lead to a fracture in the "barrel" position of the hub and complete hub failure.

    Remedy: Dealer will install steel hubs in place of aluminum hubs without charge to owner.

    Model years: 1976, 1977

  13. Gear box (other than rack and pinion) (steering)

    NHTSA 77V011000 Reported 2,200 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The lower steering shaft yoke clamp bolts on the involved vehicles may not have been sufficiently tightened. Should these bolts lossen and come off, the lower steering shaft could separate from the steering gear.

    Remedy: The dealer will secure the clamp bolt and make the necessary modifications on the lower steering shaft, free of charge.

    Model years: 1974, 1975, 1976

  14. Drum (service brakes)

    NHTSA 77V013000 Reported 830 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Cracks may be present in the brake spider. These cracks could eventually cause the brake spider to fail. This could allow separation of that portion of the brake spider that retains the brake camshaft, the brake chamber, and the brake chamber bracket from the foundation brake assembly. Brake pull in the direction opposite the affected…

    Remedy: The dealer will inspect and modify the affected brake spiders, free of charge.

    Model years: 1975, 1976

  15. Chamber (service brakes)

    NHTSA 76V083000 Reported 404 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1974, 1975

  16. Steering wheel/handle bar (steering)

    NHTSA 76V060000 Reported 608 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1975, 1976

  17. Motor (visibility)

    NHTSA 76V005000 Reported 790 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1975

  18. Wheel speed sensor (service brakes)

    NHTSA 76V006000 Reported 350 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1975

  19. Steering wheel/handle bar (steering)

    NHTSA 75V140000 Reported 402 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1974, 1975

  20. Check valve (service brakes)

    NHTSA 75V141000 Reported 935 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1974, 1975

  21. Hoses, lines/piping, and fittings (service brakes)

    NHTSA 75V139000 Reported 110 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1975

  22. Drum (service brakes)

    NHTSA 75V060000 Reported 600 vehicles potentially affected MACK TRUCKS, INCORPORATED

    Model years: 1974

Other Mack models

Source: NHTSA recall and complaint databases and EPA fuel economy data, October 2026. Complaint counts are owner reports to NHTSA, not verified defects. Recall counts are safety campaigns that list this model year; whether a particular car was already repaired depends on its VIN. How this data is compiled.