Engine:mounts
Defect Summary
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.
Corrective Action
Dealer will inspect and, if necessary, replace aluminum support brackets with brackets made from ductile iron for increased strength.
Similar Recalls
Other recalls from Mack Trucks, Inc. or involving Engine And Engine Cooling.
FAQ: Recall 78V170000
Your rights, the repair process, and what each field on this page means.
What is recall 78V170000?
NHTSA recall 78V170000 was issued by Mack Trucks, Inc. on August 8, 1978. It addresses: Engine:mounts. The recall affects approximately 850 vehicles, with the defect involving the Engine And Engine Cooling component.
How do I get this recall repaired?
Contact any authorized Mack Trucks, Inc. dealer and reference NHTSA recall ID 78V170000 or the manufacturer campaign number NR (Not Reported). Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.