By model year
Mack U Series complaints by model year
Owner complaints filed with NHTSA, all years filed, by model year.
Source: NHTSA ODI. Complaints are not verified by NHTSA, and NHTSA publishes no sales volumes, so counts are not rates.
Model line
Mack U Series
Every Mack U Series model year on file, 1976 to 1989. Pick a year for its recalls, investigations, service bulletins and the full text of owner complaints.
Owner complaints, all model years00 involved a crash, fire, injury or death
Model years121976 to 1989
Recall campaigns10Distinct campaigns listing it
Service bulletins264Summed across model years
Components
Complaints by component
Owner complaints across all model years, by component.
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Source: NHTSA ODI complaints file.
Model years
The record for each Mack U Series model year
Peer index compares complaints with the median vehicle of the same model year and body class (100 is the median). It corrects for age, not for how many were sold.
| Year | Body | Complaints | Severity index | Peer index | Recalls | Investigations | Bulletins |
|---|---|---|---|---|---|---|---|
| 1989 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1988 | Not decoded | 0 | None | None | 4 | 0 | 22 |
| 1987 | Not decoded | 0 | None | None | 2 | 0 | 22 |
| 1984 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1983 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1982 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1981 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1980 | Not decoded | 0 | None | None | 4 | 0 | 22 |
| 1979 | Not decoded | 0 | None | None | 3 | 0 | 22 |
| 1978 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1977 | Not decoded | 0 | None | None | 1 | 0 | 22 |
| 1976 | Not decoded | 0 | None | None | 1 | 0 | 22 |
Source: NHTSA ODI. Body class from NHTSA's VIN decoder where decoded.
Latest recalls
Recent campaigns covering the Mack U Series
- 89V-086 May 22, 1989
Steering wheel retaining nuts may have been improperly installed and/or torqued
Steering · 16k vehicles - 89V-032 Mar 3, 1989
Incorrect high pressure power steering hose may have been installed
Steering · 3,127 vehicles - 88V-125 Jul 27, 1988
Some of the nuts/bolts used to fasten the steering pitman arm may loosen
Steering · 6,400 vehicles - 88V-085 May 23, 1988
Clamp plates used between the drive shaft and carrier yokes may crack and could break due to improper heat treatment
Powertrain · 203 vehicles - 87V-179 Nov 23, 1987
Cross steering levers may be improperly heat treated and subject to fail during normal operation
Steering · 323 vehicles - 84V-033 Mar 22, 1984
Improper steering clamp bolts and torque applied during installation
Steering · 4,393 vehicles - 82V-019 Mar 2, 1982
Certain vehicles may be subject to steering shaft separation due to loose set screws in the dash sheet bearing which may allow the shaft to move
Steering · 22 vehicles - 81V-088 Jul 8, 1981
Retaining pin for the brake control knob has been misaligned (off the center line of the valve plunger hole)
Brakes · 10k vehicles - 80V-054 May 6, 1980
Prefabricated pinch bolt clamp at the lower steering shaft lower yoke may not perform adequately when tightened to specifications
Steering · 109 vehicles - 80V-052 May 6, 1980
On certain vehicles, the knob that operates the tractor park valve may break off, rendering the valve inoperable
Brakes · 9,666 vehicles
Source: NHTSA ODI recalls file.