The defect
CLAMP PLATES USED BETWEEN THE DRIVE SHAFT AND CARRIER YOKES MAY CRACK AND COULD BREAK DUE TO IMPROPER HEAT TREATMENT.
The risk
IF CLAMP PLATE BREAKS, YOKE WOULD FLY OFF AT DETACHEDPOINT AND COULD INJURY ANYONE STRUCK BY FLYING FRAGMENTS. ALSO, THE DETACHEDINNER SHAFT COULD INTERFERE WITH THE BRAKE SYSTEM AIR SUPPLY HOSES AND TRACTORTIRES, WHICH COULD RESULT IN LOSS OF TRUCK CONTROL AND AN ACCIDENT.
The remedy
INSTALL NEW CLAMPING PLATES AND CAPSCREWS IN ALL LOCATIONS AS NEEDED.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack DM Series | 1988 |
| Mack DMM Series | 1988 |
| Mack R series | 1988 |
| Mack RD Series | 1988 |
| Mack RM Series | 1988 |
| Mack U Series | 1988 |
Components: POWER TRAIN:DRIVELINE:CENTER SUPPORT BEARING
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack DM Series | 1988 | 0 | 5 |
| Mack DMM Series | 1988 | 0 | 5 |
| Mack R series | 1988 | 0 | 6 |
| Mack RD Series | 1988 | 0 | 8 |
| Mack RM Series | 1988 | 0 | 4 |
| Mack U Series | 1988 | 0 | 4 |
Other power train recalls in 1988
11 of the 197 recall campaigns reported to NHTSA in 1988 concerned the power train; MACK TRUCKS, INCORPORATED filed 245 campaigns in all.
| 88V177000 15 Nov 1988 | HARLEY-DAVIDSON MOTOR CO. |
| 88V166000 18 Oct 1988 | VOLVO OF AMERICA CORP. |
| 88V128000 1 Aug 1988 | CHRYSLER CORPORATION |
| 88V101000 27 Jun 1988 | FORD MOTOR COMPANY |
| 88V084000 20 May 1988 | FORD MOTOR COMPANY |
| 88V050000 4 Apr 1988 | GENERAL MOTORS CORP. |
| 88V045000 28 Mar 1988 | GENERAL MOTORS CORP. |
| 88V037000 23 Mar 1988 | GENERAL MOTORS CORP. |
NHTSA recalls (public domain) · all recalls of 1988