Does the 1977 Mack RWL have any recalls?

4 recalls found in NHTSA data as of September 22, 2026, covering: steering, electrical system, service brakes, air, engine and engine cooling. Recalls apply to the model and year; whether a particular vehicle is included, and whether it has been repaired, depends on its VIN.

How do I check if my 1977 Mack RWL recall has been fixed?

Enter your 17-character VIN at nhtsa.gov/recalls, or ask a Mack dealer. Recall repairs are free. NHTSA's VIN search doesn't list recalls that were already repaired.

How many complaints have owners filed about the 1977 Mack RWL?

0 complaints filed with NHTSA. Complaints are unverified reports from the public that NHTSA uses to decide what to investigate.

1977 Mack RWL recalls

Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.

4 recalls found in NHTSA data as of September 22, 2026

For the 1977 Mack RWL. These apply to the model and year, not to one particular vehicle: check your VIN to see whether yours is included and whether it has been repaired.

Has your Mack been repaired?

Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.

Check your VIN with NHTSA

NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.

1977 Mack RWL recalls, newest first

June 1, 1979NHTSA 79V1370006,673 vehicles potentially affected

Steering › Linkages

Summary: The pitman arm retaining nut may not have been torqued to manufacturer specifications. This could result in inadequate retention of the nut at the output shaft, allowing the pitman arm to become loose.
Remedy: Dealer will inspect and retorque pitman arm, if necessary, at no cost to owner.

This recall on nhtsa.gov

October 11, 1978NHTSA 78V222000161 vehicles potentially affected

Electrical system › Wiring

Summary: A short circuit could occur due to chafing or wire disconnection in the box.
Remedy: The wiring in the sleeper box will be corrected, free of charge.

This recall on nhtsa.gov

October 3, 1978NHTSA 78V21000019,370 vehicles potentially affected

Service brakes, air › Antilock › Interconnecting assembly(wiring)

Summary: 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".
Remedy: 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.

This recall on nhtsa.gov

August 8, 1978NHTSA 78V170000850 vehicles potentially affected

Engine and engine cooling › Engine

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.
Remedy: Dealer will inspect and, if necessary, replace aluminum support brackets with brackets made from ductile iron for increased strength.

This recall on nhtsa.gov

Owner complaints

No owner complaints about the 1977 Mack RWL were found in NHTSA’s complaint data.

Other Mack RWL years

Other 1977 Mack models

Questions

Does the 1977 Mack RWL have any recalls?: 4 recalls found in NHTSA data as of September 22, 2026, covering: steering, electrical system, service brakes, air, engine and engine cooling. Recalls apply to the model and year; whether a particular vehicle is included, and whether it has been repaired, depends on its VIN.
How do I check if my 1977 Mack RWL recall has been fixed?: Enter your 17-character VIN at nhtsa.gov/recalls, or ask a Mack dealer. Recall repairs are free. NHTSA's VIN search doesn't list recalls that were already repaired.
How many complaints have owners filed about the 1977 Mack RWL?: 0 complaints filed with NHTSA. Complaints are unverified reports from the public that NHTSA uses to decide what to investigate.