- The problem
- The steel brackets on the suspension beam were found to be deficient due to excessive shrinkage and low mechanical properties. Failure of one or both of these brackets could cause a separation of the axle housing from the suspension.
- The fix
- The dealer will inspect and, if necessary, replace any suspect bogie spring insulator caps with new caps meeting the proper specifications at no cost to owner.
Vehicle safety record
1978 Mack MB Problems, complaints & recalls
No owner complaints about the 1978 Mack MB have been filed with NHTSA. It is covered by 3 recalls, the latest in January 1979 for the hanger / bracket.
NHTSA data checked
CAbout as many problems as a typical MB year, for its age
- Complaints
- 0
- Recalls
- 3
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1978 Mack MB recalls 3
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
- 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 brake systems".
- The fix
- 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.
- The problem
- 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.
- The fix
- The dealer will inspect and, if necessary, install cross steering arms of improved design and greater strength.
What owners say
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No complaints about the 1978 Mack MB 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 MB: every year compared
All MB years1978 Mack MB vs rivals
| Vehicle | Complaints | Recalls | Grade | |
|---|---|---|---|---|
| 1978 Mack MB | 0 | 3 | 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 MB
Does the 1978 Mack MB have any recalls?
Yes - NHTSA lists 3 recalls for the 1978 Mack MB: hanger / bracket (January 1979); interconnecting assembly(wiring) (October 1978); arm (August 1978). 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 MB had?
None have been filed with NHTSA so far.
Is the 1978 Mack MB a reliable vehicle?
Its Safety Index is 50 out of 100 (grade C: about as many problems as a typical Mack MB 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 MB 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