Recall Register

1979 Mack U Series: recalls and complaints

NHTSA lists 3 recall campaigns for the 1979 Mack U Series. The newest campaign is 81V088000. NHTSA received the report on 8 Jul 1981. The NHTSA record gives the component Service Brakes, Air / Controls / Hand Control/Valve. NHTSA has no complaint on file for this model year.

The NHTSA recall file shows no do-not-drive advisory and no park-outside advisory on these campaigns.

This page cannot show if a recall applies to one vehicle. The NHTSA VIN lookup shows the unrepaired recalls of one vehicle.

Remedy of the newest campaign, 81V088000, in the NHTSA record

The holes will be retooled to provide correct alignment and plastic knobs will be replaced by knobs of stronger material having metal reinforcements.
NHTSA VIN lookup

Complaint information entered into NHTSA’s Office of Defects Investigation vehicle owner's complaint database is used with other data sources to identify safety issues that warrant investigation and to determine if a safety-related defect trend exists.

NHTSA publishes these words. Source: NHTSA Datasets and APIs, section Complaints, read on . Complaint file through . Recall file through .

Since the last update

No tracked figure of this page changed in a data update. What the log tracks

All updates to the register

Recall campaigns

3 campaigns, newest first. 19,775 units in total.

  1. 81V088000Received . 10,000 units.

    Service Brakes, Air / Controls / Hand Control/Valve

    Defect, in the NHTSA record
    The retaining pin for the brake control knob has been misaligned (off the center line of the valve plunger hole). This causes the knob to be overstressed at the retaining pin hole area causing it to separate from the valve.
    Remedy, in the NHTSA record
    The holes will be retooled to provide correct alignment and plastic knobs will be replaced by knobs of stronger material having metal reinforcements.

    Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: .

  2. 80V054000Received . 109 units.

    Steering / Gear Box (Other Than Rack and Pinion)

    Defect, in the NHTSA record
    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, in the NHTSA record
    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.

    Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: .

  3. 80V052000Received . 9,666 units.

    Parking Brake / Driveline / Air

    Defect, in the NHTSA record
    On certain vehicles, the knob that operates the tractor park valve may break off, rendering the valve inoperable.
    Remedy, in the NHTSA record
    Defective knobs will be replaced with an improved type, without charge to owner.

    Report filed by MACK TRUCKS, INCORPORATED. Owner notification date in the NHTSA record: .

The campaign number opens the NHTSA record. Each quotation is the text of the NHTSA recall file.

Recall campaign: One recall in the NHTSA recall file, with one campaign number. A campaign can name many makes, models and model years.

Units: The number of vehicles or products that a recall can include. The manufacturer or the firm reports the number to the agency.

Complaints by component

The NHTSA complaint file has no complaint for this model year.

Investigations

The NHTSA investigation file has no investigation that names this model year.

Investigation: A study of a possible safety defect by the NHTSA Office of Defects Investigation. An investigation with no closing date in the NHTSA file is open.

Other model years

The number under each year is the number of recall campaigns.

  1. 19761
  2. 19771
  3. 19781
  4. 19793
  5. 19804
  6. 19811
  7. 19821
  8. 19831
  9. 19841
  10. 19872
  11. 19884
  12. 19891

A year without a link has fewer than 2 campaigns and fewer than 25 complaints. It has no page.

Official channels

Cite this page

Recall Register. 1979 Mack U Series: recalls and complaints. https://recallregister.com/vehicle/mack/u-series/1979/. Source: NHTSA Office of Defects Investigation, recall, complaint and investigation files. Data through .

Sources

Source
NHTSA Office of Defects Investigation
Licence
US government work, public domain
Recall file through
29 Sep 2026
Complaint file through
29 Mar 2018
First complaint in the file
1 Jan 1995
Manufacturer in the recall file
MACK TRUCKS, INCORPORATED

The NHTSA record is the authority. A complaint count is the number of different complaint numbers for the make, the model and the model year. How the register is made. Report an error.

Questions

How many units are in the recall campaigns for the 1979 Mack U Series?
19,775 units in 3 campaigns. A campaign can name other models and model years, and its units include them.
How many recall campaigns does the Mack U Series have for all model years?
NHTSA lists 10 recall campaigns for the Mack U Series, model years 1976 to 1989. 3 of them name the 1979 model year.
Is an NHTSA investigation of the 1979 Mack U Series open?
The NHTSA investigation file has no investigation that names this model year.