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This bulletin applies to 2014 Jeep Grand Cherokee vehicles equipped with the Quadra-Trac II 4WD system or two Speed On Demand Transfer Case. The owner may comment about a bump felt in the driveline while turning from a stop.

A new software release is available that “provides a more refined control” of the 4WD system to more smoothly engage and release the 4WD system.

Install a battery charger to make sure that battery voltage stays between 13.2 and 13.5 volts. Reprogram the DTCM with software release 14.03 or higher. Clear any DTCs that may have set during the reprogramming.

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