- The problem
- 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.
- The fix
- The dealer will inspect and, if necessary, replace the anti-wheel lock controller without charge to owner.
Vehicle safety record
1976 Mack R Problems, complaints & recalls
No owner complaints about the 1976 Mack R have been filed with NHTSA. It is covered by 4 recalls, the latest in April 1978 for the control unit / module.
NHTSA data checked
DMore problems than a typical R year, for its age
- Complaints
- 0
- Recalls
- 4
- Crashes
- 0
- Fires
- 0
- Injuries
- 0
- Deaths
- 0
1976 Mack R recalls 4
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 synflex-type oil pressure signal line may have been routed too close to the exhaust manifold. Excessive heat may cause the line to rupture, and oil leakage may occur.
- The fix
- The dealer will reroute the oil pressure signal line to eliminate potential fire hazard, without charge to owner.
- The problem
- The tee bracket, which is mounted on the front axle of the bogie, may fail due to vibration brought on by road surface irregularities. Bracket failure would leave the tee bracket unsupported and cause broken hose connector fittings. This would result in automatic application of the spring emergency brakes.
- The fix
- The dealer will replace the defective bracket with a redesigned version.
- The problem
- The flex blade fans on the involved vehicles may develop cracks in the laminated stiffener as a result of fatigue during operation. If such a condition exists and the cracks go undetected, continued operation could cause pieces of the stiffener to break off.
- The fix
- Dealer will replace the original fan with a steel fixed blade fan, free of charge.
What owners say
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No complaints about the 1976 Mack R 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 R: every year compared
All R yearsQuestions about the 1976 Mack R
Does the 1976 Mack R have any recalls?
Yes - NHTSA lists 4 recalls for the 1976 Mack R: control unit / module (April 1978); gasoline (February 1978); multiple axle (February 1978); fan (October 1977). 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 1976 Mack R had?
None have been filed with NHTSA so far.
Is the 1976 Mack R a reliable vehicle?
Its Safety Index is 39 out of 100 (grade D: more problems than a typical Mack R 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 1976 Mack R 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