Recall 78V-170: 1975–1978 Mack RWL, 1975–1978 Mack RWS and 2 more
MACK TRUCKS, INCORPORATED recall for engine and engine cooling, reported to NHTSA on Aug 8, 1978, covering about 850 vehicles.
The problem
The possibility exists that the aluminum engine rear support brackets may fail due to metal fatigue. This type of failure would allow the engine and transmission assembly to dislocate downward. This will result in throttle control loss with the engine operating continuously in the mid to upper range of the governed speed range.
The fix
Dealer will inspect and, if necessary, replace aluminum support brackets with brackets made from ductile iron for increased strength.
Notes
Vehicle description: trucks.system: engine; engine mounting bracket.consequences of defect: loss of throttle control may result in loss of vehiclecontrol and an accident.
Recall details
| Manufacturer | MACK TRUCKS, INCORPORATED |
|---|---|
| Component | Engine and Engine Cooling › Engine |
| Recall started by | the manufacturer |
| NHTSA campaign number | 78V170000 |
Vehicles in this recall
| Vehicle | Model years | |
|---|---|---|
| Mack RWL | 1975, 1976, 1977, 1978 | All years |
| Mack RWS | 1975, 1976, 1977, 1978 | All years |
| Mack WL | 1975, 1976, 1977, 1978 | All years |
| Mack WS | 1975, 1976, 1977, 1978 | All years |
Not every vehicle of these model years is included. Enter your VIN at nhtsa.gov/recalls ↗ or ask a dealer.
Frequently asked questions
What is recall 78V-170?
The possibility exists that the aluminum engine rear support brackets may fail due to metal fatigue. This type of failure would allow the engine and transmission assembly to dislocate downward. This will result in throttle control loss with the engine operating continuously in the mid to upper range of the governed speed range.
How is recall 78V-170 fixed?
Dealer will inspect and, if necessary, replace aluminum support brackets with brackets made from ductile iron for increased strength.
Is the recall repair free?
Yes. Safety recall repairs are free at authorized dealers. Check whether your vehicle is included with its VIN at nhtsa.gov/recalls.