This bulletin released by Infiniti applies to all of the maker’s vehicles but also applies to others, as well, regarding flat-towing. Failure to follow these guidelines can result in severe transmission or drivetrain damage.
Jeep Driveline Jitters
This bulletin applies to 2011-2013 Jeep Grand Cherokee vehicles equipped with the Quadra-Trac-TRAC II 4WD system or two speed on demand transfer case. Owners may indicate that they have experienced a driveline bump felt during acceleration at about 10 mph, the SERV 4WD message appears and the vehicle shifts from 4WD to 2WD, and/or binding of the front driveline while turning on steep grades at about 3-5 mph.