- The problem
- 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.
- The fix
- 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.
Vehicle safety record
1979 Mack FM Problems, complaints & recalls
No owner complaints about the 1979 Mack FM have been filed with NHTSA. It is covered by 1 recall, the latest in July 1979 for the leaf spring assembly.
NHTSA data checked
Rated once enough FM years are on file
- Complaints
- 0
- Recalls
- 1
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1979 Mack FM recalls 1
Recall repairs are free. Your dealer fixes them whether or not you bought the car there - check your VIN at nhtsa.gov/recalls to see if yours is done. What to do
What owners say
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No complaints about the 1979 Mack FM yet
No owner has filed a complaint about this vehicle with NHTSA. If yours has a problem, share it here and report it to NHTSA.
1979 Mack FM vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 1979 Mack FM | 0 | 1 | - | |
| 1979 Mack Mack | 1 | 3 | D | Compare |
More sales usually means more complaints, so compare similar vehicles of the same year. The grade compares each vehicle with its own model's other years.
Questions about the 1979 Mack FM
Does the 1979 Mack FM have any recalls?
Yes - NHTSA lists 1 recall for the 1979 Mack FM: leaf spring assembly (July 1979). Recall repairs are free at any authorized dealer. Enter your VIN at nhtsa.gov/recalls to see whether yours has been fixed.
How many complaints has the 1979 Mack FM had?
None have been filed with NHTSA so far.
What should I do if my 1979 Mack FM has a problem?
If it is a safety problem, stop driving it if it is unsafe and contact your dealer. Report it to NHTSA at nhtsa.gov/report-a-safety-problem - enough reports start investigations and recalls - and share your experience here so other owners know what to look for.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked . Complaints are owners' own reports and are not verified. How we use the data