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Mack Rws Recalls & Complaints by Model Year

NHTSA lists 9 safety recalls and 0 owner complaints across 7 model years of the Mack Rws (1975–1981).

9
safety recalls, all years
0
owner complaints, all years
1978
year with most recalls

Pick your Mack Rws model year

Model yearRecallsComplaints
1981 Mack Rws10
1980 Mack Rws10
1979 Mack Rws50
1978 Mack Rws60
1977 Mack Rws50
1976 Mack Rws10
1975 Mack Rws10

All Mack Rws recalls (9)

Every NHTSA safety campaign that lists a Mack Rws, 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. Steering wheel/handle bar (steering)

    NHTSA 79V130000 Reported 2,187 vehicles potentially affected MACK TRUCKS, INCORPORATED

    It has been determined that two screws that are part of the bearing assembly located at the cab dash sheet may not have been tightened properly. As a result, the upper steering shaft may be free to "float" throughout much of its length which may result in inadequate engagement in the slip splines of the lower steering shaft. Axle…

    Remedy: Dealer will install a sleeve between the dash sheet bearing and the upper steering shaft lower yoke to assure positive upper steering shaft location.

    Model years: 1978, 1979

  7. Electrical system: wiring

    NHTSA 78V222000 Reported 161 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A short circuit could occur due to chafing or wire disconnection in the box.

    Remedy: The wiring in the sleeper box will be corrected, free of charge.

    Model years: 1977, 1978

  8. 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

  9. 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

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.