Service bulletins for the 1981 Mack DMM
A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.
22 on file from NHTSA, as of 2026-10-19.
By type
By component
By trouble code
Only bulletins with component: Transmission and driveline are shown. Show all
| KC-2112 | 2022-07-05. Service bulletin. ELECTRICAL SYSTEM; POWER TRAIN; ENGINE AND ENGINE COOLING. Programming Failure - Chassis With Cummins Engine And An Allison Transmission |
|---|---|
| KC-745 | 2022-07-05. Service bulletin. POWER TRAIN. Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault Codes P1058 - 21 Or MID 130 PID 161 FMI 1 |
| KC-626 | 2022-06-07. Service bulletin. POWER TRAIN. Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F ( AMT-F, mDrive ), Premium Tech Tool ( PTT ) Gearbox Calibration Failure; Gearbox Calibration Operation Stops And Fails At 33% When Run With Transmission Removed |
| KC-648 | 2022-06-07. Service bulletin. UNKNOWN OR OTHER; POWER TRAIN. Mack - PTO Pump Speed Calculator |
The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.