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Steering: steering wheel/handle barRecall 79V-130 · Mack vehicles

MACK TRUCKS, INCORPORATED recall 79V-130 covers 2,187 Mack vehicles for a steering: steering wheel/handle bar problem, reported to NHTSA on May 30, 1979.

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Vehicles repairedNo manufacturer report yet
Vehicles affected2,1872 models
ReportedMay 30, 1979Owners notified Nov 23, 1979
Complaints since0Same system, after the recall

Source: NHTSA recall 79V130000 and manufacturer quarterly reports. Started by an NHTSA defect investigation.

What's wrong

The problem

IT HAS BEEN DETERMINED THAT TWO SCREWS THAT ARE PART OF THE BEARING ASSEMBLY LOCATED AT THE CAB DASH SHEET MAY NOT HAVE BEEN TIGHTENED PROPERLY. AS A RESULT, THE UPPER STEERING SHAFT MAY BE FREE TO "FLOAT" THROUGHOUT MUCH OF ITS LENGTH WHICH MAY RESULT IN INADEQUATE ENGAGEMENT IN THE SLIP SPLINES OF THE LOWER STEERING SHAFT. AXLE ARTICULATION COULD RESULT IN DISENGAGEMENT OF THE LOWER STEERING SHAFT SLIP SPLINES.

What to do

The fix

DEALER WILL INSTALL A SLEEVE BETWEEN THE DASH SHEET BEARING AND THE UPPER STEERING SHAFT LOWER YOKE TO ASSURE POSITIVE UPPER STEERING SHAFT LOCATION.

VEHICLE DESCRIPTION: TRUCKS.SYSTEM: STEERING ASSEMBLY; STEERING COLUMN SHAFT, UPPER.CONSEQUENCES OF DEFECT: LOSS OF STEERING CONTROL COULD CAUSE LOSS OF VEHICLECONTROL AND AN ACCIDENT.

Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.

2 models

Vehicles in this recall

Mack RWL1978, 1979
Mack RWS1978, 1979

Built from November 1, 1977 to April 1, 1979. Not every vehicle in these model years is included; check by VIN.

Background

The investigation behind this recall

  1. STEERING DEFECTEA79090 · closed Jul 12, 1979
    NHTSA