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Jeep TSB #21-018-15
2015 Jeep Grand Cherokee
TSB Document:
Affected 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.
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