RecallMyCar

1978 Mack Dm Recalls, Complaints & Specs

6 safety recalls list the 1978 Mack Dm. Check your own VIN below.

6
safety recalls
0
owner complaints to NHTSA

6 safety recalls for the 1978 Mack Dm

Most recent first. Recall repairs are free at any authorised dealer. Click a recall for the full defect, consequence and remedy text.

  1. 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.

  2. Steering wheel/handle bar (steering)

    NHTSA 79V134000 Reported 64,150 vehicles potentially affected MACK TRUCKS, INCORPORATED

    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.

    Remedy: Dealer will install an additional bracket in this area to prevent the steering wheel from dislocating in the event of a bracket failure.

  3. Steering wheel/handle bar (steering)

    NHTSA 79V082000 Reported 12,000 vehicles potentially affected MACK TRUCKS, INCORPORATED

    An improper pinch bolt and nut may have been used in the clamping of the steering shaft to the steering gear input shaft. Due to clamping force loads applied at the bolt, the nut could yield, resulting in looseness of the input shaft yoke. Should this condition go unnoticed, spline wear could cause shaft separation.

    Remedy: Vehicles will be inspected and, if necessary, the correct fasteners will be installed at no charge to owner.

  4. Multiple axle (suspension)

    NHTSA 79V017000 Reported 4,000 vehicles potentially affected MACK TRUCKS, INCORPORATED

    A casting deficiency exists in the lower section of the caps resulting in a reduction in the thickness of the material. Failure of a cap can allow the end of the rear spring to detach from the axle housing.

    Remedy: Dealer will inspect and, if necessary, replace any of the spring insulator caps found to be defective. This will be done at no cost to owner.

  5. 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.

  6. Arm (steering)

    NHTSA 78V172000 Reported 13,800 vehicles potentially affected MACK TRUCKS, INCORPORATED

    The existing cross steering arms may have insufficient fatigue life in the neck area. This is near the boss for the cross steering tube ball joint connection. Failure of either of the cross steering levers could lead to loss of steering control of the right front wheel.

    Remedy: The dealer will inspect and, if necessary, install cross steering arms of improved design and greater strength.

No owner complaints on file

NHTSA has no owner complaints on file for the 1978 Mack Dm. For context, the average model year in NHTSA's database has dozens; a zero can mean a reliable vehicle, a rare one, or both.

Compare Mack Dm model years

Recall and complaint counts for every Mack Dm model year in NHTSA's database.

Model yearRecallsComplaints
1965 Mack Dm10
1966 Mack Dm10
1967 Mack Dm20
1968 Mack Dm20
1969 Mack Dm30
1970 Mack Dm40
1971 Mack Dm60
1972 Mack Dm40
1973 Mack Dm40
1974 Mack Dm70
1975 Mack Dm60
1976 Mack Dm50
1977 Mack Dm110
1978 Mack Dm60
1979 Mack Dm10
1987 Mack Dm10
1988 Mack Dm10
1989 Mack Dm20
1990 Mack Dm10
1991 Mack Dm10
1992 Mack Dm20
1993 Mack Dm10
1998 Mack Dm20
1999 Mack Dm20
2000 Mack Dm30
2001 Mack Dm20
2002 Mack Dm10
2003 Mack Dm20
2004 Mack Dm40
2005 Mack Dm10
2006 Mack Dm11

Checking a specific 1978 Mack Dm

How do I know if my 1978 Mack Dm has an open recall?

Enter your 17-character VIN above. The VIN is on the driver's side dashboard (visible through the windshield), the driver's door jamb sticker, and your registration or insurance card. The check runs against NHTSA's live database and tells you which campaigns list your vehicle. 6 campaigns currently list the 1978 Mack Dm; your car may already have been repaired under some of them.

Is the recall repair free?

Yes. Under federal law, manufacturers must fix safety recalls at no charge for vehicles up to 15 years old from the date of sale to the first owner. Contact any authorised Mack dealer with your VIN and the NHTSA campaign number (for example 78V172000).

What is the difference between a recall and a complaint?

A recall is a safety campaign filed by the manufacturer or ordered by NHTSA, with a defined defect and remedy. A complaint is a report an owner sent to NHTSA; it is not verified, but patterns of complaints are what trigger NHTSA investigations and, eventually, recalls.

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.