Vehicle recall 78V068000 · April 4, 1978
Mack DM, DMM and 11 more models
An axle "no brake" condition could result from an eaton controller internal electrical malfunction.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- 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.
- Notes
- Vehicle description: trucks equipped with eaton 21 anti-lock controllers.system: service brakes; anti-wheel lock solenoid.consequences of defect: loss of brakes on any one axle will result in extendedvehicle stopping distances, which could lead to a vehicle accident.
Recall details
- NHTSA campaign
- 78V068000
- Reported to NHTSA
- April 4, 1978
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- September 1, 1978
- Vehicles potentially affected
- 9,700
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Service brakes, air › Antilock › Control unit/module
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack DM (1974-1976): 1976, 1975, 1974
- Mack DMM (1974-1976): 1976, 1975, 1974
- Mack F (1974-1976): 1976, 1975, 1974
- Mack HMM (1974-1976): 1976, 1975, 1974
- Mack MB (1974-1976): 1976, 1975, 1974
- Mack R (1974-1976): 1976, 1975, 1974
- Mack RD (1974-1976): 1976, 1975, 1974
- Mack RL (1974-1976): 1976, 1975, 1974
- Mack RM (1974-1976): 1976, 1975, 1974
- Mack RS (1974-1976): 1976, 1975, 1974
- Mack U (1974-1976): 1976, 1975, 1974
- Mack WL (1974-1976): 1976, 1975, 1974
- Mack WS (1974-1976): 1976, 1975, 1974
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.