Vehicle recall 88V085000 · May 23, 1988
Mack DM Series, DMM Series and 4 more models
Clamp plates used between the drive shaft and carrier yokes may crack and could break due to improper heat treatment.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Clamp plates used between the drive shaft and carrier yokes may crack and could break due to improper heat treatment.
- Consequence
- 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.
- Remedy
- Install new clamping plates and capscrews in all locations as needed.
- Notes
- System: drive shaft yoke clamp plates.vehicle description: heavy duty trucks.
Recall details
- NHTSA campaign
- 88V085000
- Reported to NHTSA
- May 23, 1988
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- May 5, 1988
- Vehicles potentially affected
- 203
- Initiated by
- the manufacturer
- Components
- Power train › Driveline › Center support bearing
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack DM Series (1988): 1988
- Mack DMM Series (1988): 1988
- Mack R Series (1988): 1988
- Mack RD Series (1988): 1988
- Mack RM Series (1988): 1988
- Mack U Series (1988): 1988
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.