The defect
TRW SUPPLIED POWER STEERING GEARS WITH NON-HEAT-TREATED WORM SCREWS. THE STEERING GEARS WITHOUT HEAT TREATED WORM SCREWS CAN LOCK UP IN TIGHT TURNING MANEUVERS.
The risk
LOCK UPS OF THE STEERING GEAR CAUSES LOSS OF STEERINGCONTROL AND COULD RESULT IN AN ACCIDENT.
The remedy
REPLACE THE NON-HEAT-TREATED WORM SCREWS.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Kenworth | 1990, 1991 |
Components: STEERING:GEAR BOX (OTHER THAN RACK AND PINION)
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Kenworth | 1990 | 1 | 1 |
| Kenworth | 1991 | 0 | 1 |
Other steering recalls in 1991
21 of the 220 recall campaigns reported to NHTSA in 1991 concerned the steering; PACCAR, INCORPORATED filed 199 campaigns in all.
| 91V208000 27 Nov 1991 | NAVISTAR INTL CORP. |
| 91V203000 19 Nov 1991 | VOLVO GM HEAVY TRUCK CORP |
| 91V193000 12 Nov 1991 | SUBARU OF AMERICA, INC. |
| 91V157000 18 Sept 1991 | GENERAL MOTORS CORP. |
| 91V153000 17 Sept 1991 | WINNEBAGO IND., INC. |
| 91V152000 17 Sept 1991 | WINNEBAGO IND., INC. |
| 91V159000 12 Sept 1991 | THOMAS BUILT BUSES, INC. |
| 91V142000 26 Aug 1991 | GILLIG CORPORATION |
NHTSA recalls (public domain) · all recalls of 1991