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May 9, 2022 Service bulletin

Mack Chassis

Mack technical service bulletin KC-626 for 1990-1999, 2001 Mack Mack, 2016-2022 Mack Anthem (An) and 2018-2023 Mack Granite (GR) and others.

Bulletin number
KC-626
Component
Power train
Summary
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

Owners of these vehicles have filed 19 complaints in the transmission category.

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