WenmarOpen by Wenmar Pro

Service bulletin PSM23m2na71

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.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10246099
Published by NHTSA2023-12-05
Manufacturer's numberPSM23m2na71
Manufacturer's date2023-11-10
NHTSA componentPOWER TRAIN

NHTSA's summary

Parts Sales and Marketing Bulletin: Mack Trucks is excited to announce an additional year warranty program on REMACK AMT mDRIVE Complete Transmissions. This extended warranty of 3 years or 350,000 miles on the transmission will be applicable when dealer installed, required parts are installed and is registered via eService.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
MACK ANTHEM (AN)2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
MACK GRANITE (GR)2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
MACK GRANITE (GU)2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
MACK PINNACLE (CHU)2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
MACK PINNACLE (CXU)2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it)
MACK PINNACLE (PI/PN)2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
MACK TE2020 to 2021
MACK TERRAPRO (MRU)2020, 2021, 2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)
MACK TERRAPRO (TE)2022, 2023, 2024 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20261082026-03-11. Powertrain

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB M-913-001 2026092026-10-02. Service bulletin. Parker engine-mounted hydraulic pump service bulletin.
CBR 2573-1 2026042026-05-05. Service bulletin. CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR 2362-3 2026042026-05-04. Service bulletin. CBR - Mack Carrier Nut Adhesive Change.
CBR 2218-6 0320262026-04-02. Service bulletin. CBR - Parker F3 Hydraulic Pump Troubleshooting.
S4558 2025062025-07-03. Service campaign. Mack trucks has determined that certain model year 2021-2024 PI models built with 4.19 rear axle ratios could experience elevated axle oil temps under high road speeds. To correct this issue the 4.19 ratio carriers need to be swapped to 3.79 ratio carriers. Follow the instructions below to replace both carriers with new ones.
CBR 2464-1 2025052025-06-02. Service bulletin. Mack Chassis - Rear Axle Overheat
CBR-2387 2024092024-10-04. Service bulletin. CBR: Vehicles Equipped With A Lift Axle - Wheel Speed Fault Code SPN 793, SPN 794 Set When Axle Is Up
CBR-2258 2024092024-10-03. Service bulletin. CBR: Diagnostic Trouble Code (DTC) P107471 - AMT-F
CBR-731 2024092024-10-03. Service bulletin. CBR: Automated Manual Transmission (AMT) Model D or F (mDrive and I-Shift, AMT-D, AMT-F) - Transmission Oil Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 And Newer Emissions, Common Model Years 2010 And Newer
CBR-2391 2024082024-09-04. Service bulletin. CBR: Diagnostic Trouble Code (DTC) U010187- Lost Communication With TECU