Does the 1977 Mack U Series have any recalls?

1 recall found in NHTSA data as of September 22, 2026, covering: steering. 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 U Series 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 U Series?

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

1977 Mack U Series recalls

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

1 recall found in NHTSA data as of September 22, 2026

For the 1977 Mack U Series. 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 U Series recalls, newest first

May 6, 1980NHTSA 80V054000109 vehicles potentially affected

Steering › Gear box (other than rack and pinion)

Summary: The prefabricated pinch bolt clamp at the lower steering shaft lower yoke may not perform adequately when tightened to specifications. The clamp may then deform and loss of clamping force and steering shaft disengagement may result.
Remedy: Dealer will retrofit with lower steering shaft lower yokes that provide for integral pinch bolt installation in place of previous separately fabricated clamp for the pinch bolt.

This recall on nhtsa.gov

Owner complaints

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

Other Mack U Series years

Other 1977 Mack models

Questions

Does the 1977 Mack U Series have any recalls?: 1 recall found in NHTSA data as of September 22, 2026, covering: steering. 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 U Series 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 U Series?: 0 complaints filed with NHTSA. Complaints are unverified reports from the public that NHTSA uses to decide what to investigate.