- The problem
- Spring seat can deform, which causes a decrease in the clamping force in the suspension assembly. Loss of clamping force may bring about axle misalignment or axle housing failure.
- The fix
- The axle housing will be inspected and replaced, if necessary. The spring seats will also be replaced.
Vehicle safety record
1978 Mack MC Series Problems, complaints & recalls
No owner complaints about the 1978 Mack MC Series have been filed with NHTSA. It is covered by 2 recalls, the latest in March 1984 for the leaf spring assembly.
NHTSA data checked
CAbout as many problems as a typical MC Series year, for its age
- Complaints
- 0
- Recalls
- 2
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1978 Mack MC Series recalls 2
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
- The problem
- The right hand front canopy cab mounting bracket interferes with the right hand brake chamber on the steering axle when in a certain degree turn and severe bumping is present.
- The fix
- The front canopy cab mounting bracket will be modified to allow for clearance of the right hand front brake chamber, without charge to owner.
What owners say
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No complaints about the 1978 Mack MC Series 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.
Mack MC Series: every year compared
All MC Series years1978 Mack MC Series vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 1978 Mack MC Series | 0 | 2 | C | |
| 1978 Mack Mack | 2 | 3 | D | Compare |
| 1978 Mack RD Series | 1 | 1 | C | 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 1978 Mack MC Series
Does the 1978 Mack MC Series have any recalls?
Yes - NHTSA lists 2 recalls for the 1978 Mack MC Series: leaf spring assembly (March 1984); body (July 1981). 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 1978 Mack MC Series had?
None have been filed with NHTSA so far.
Is the 1978 Mack MC Series a reliable vehicle?
Its Safety Index is 50 out of 100 (grade C: about as many problems as a typical Mack MC Series year, for its age). The index weighs complaints, crashes, fires, injuries, deaths and recalls against how long the vehicle has been on the road, compared with the same model's other years. It is not a measure of every repair - read the complaints and owner experiences, and have any used vehicle inspected before you buy.
What should I do if my 1978 Mack MC Series 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