Vehicle recall 76V004000 · January 13, 1976
Mack F, MB and 2 more models
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Notes
- Mack campaign no SC071.TRUCKS equipped with swtl-56 series rear axle.possibility that the rear suspension was assembled with an incorrect trunnionthat has a radiused spring seat, creating a line of contact between the springseat and the spring itself, subjecting these components to high stressconcentrations.if this condition exists it could ultimately lead to prematurespring failure, and permit axle assembly dislocation that could result in lossof vehicle control without warning to the driver, with possible vehicle crash.(correct by inspecting and installing specified spring trunnions thatincorporate flatspring seats).
Recall details
- NHTSA campaign
- 76V004000
- Reported to NHTSA
- January 13, 1976
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- February 23, 1976
- Vehicles potentially affected
- 54
- Initiated by
- the manufacturer
- Components
- Suspension › Rear › Springs › Leaf spring assembly › Leaf
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
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.