March 25, 2015 Service bulletin

Flash: 8HP70 SRT Transmission Shift Enhancements This bulletin involves reprogramming the Transmission...

Jeep technical service bulletin 21-018-15 for 2015 Jeep Grand Cherokee.

Bulletin number: 21-018-15
Component: Electrical system
Summary: Flash: 8HP70 SRT Transmission Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. A small number of customers may experience one or more of the following conditions. ? Less than desired gear shifts when driving on steep grades in lower altitudes. ? Less than desired gear shifts during aggressive, high speed driving. ? Erratic 1-2 upshift in cold ambient temperatures. ? Delayed engagement shifting from reverse to drive. ? Harsh or inconsistent upshift that happens intermittently. ? Harsh or inconsistent downshift that happens intermittently while coasting or during passing maneuvers. ? Intermittent delayed shift from 6th gear during aggressive high speed driving.

Owners of these vehicles have filed 139 complaints in the electrical category.

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