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May 21, 2015 Service bulletin

Grade gripper solenoid, replacement

Mack technical service bulletin FSB 593-013 for 2009-2016 Mack Gu, 2009-2016 Mack Cxu and 2009-2016 Mack Chu and others.

Bulletin number
FSB 593-013
Component
Power train: automatic transmission
Summary
Grade gripper solenoid, replacement. On some mack chu, cxu, gu, and td truck models built between 04/31/2008 and 05/11/2015, the solenoid valve for the grade gripper feature is prone to internal contamination in harsh environments.

Owners of these vehicles have filed 3 complaints in the transmission category.

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