2012 Jeep Grand Cherokee Owner Manual - Page 541

STARTING AND OPERATING 539 Towing Tips Before setting out on a trip, practice turning, stopping and backing the trailer in an area away from heavy traffic. Automatic Transmission The DRIVE range can be selected when towing. However, if frequent shifting occurs while in this range, the TOW/HAUL mode (if equipped), or a lower gear range, should be selected. The transmission fluid and filter should be changed if you REGULARLY tow a trailer for more than 45 minutes of continuous operation. Refer to "Maintenance Schedule" for the proper maintenance intervals. NOTE: Check the transmission fluid level before towing (5.7L engine). Electronic Speed Control - If Equipped − Do not use in hilly terrain or with heavy loads. 5 NOTE: Using the TOW/HAUL mode (if equipped) or − When using the speed control, if you experience speed drops greater than 10 mph (16 km/h), disengage until selecting a lower gear range (using the Electronic Range you can get back to cruising speed. Select (ERS) feature) while operating the vehicle under heavy operating conditions, will improve performance − Use speed control in flat terrain and with light loads to and extend transmission life by reducing excessive shiftmaximize fuel efficiency. ing and heat buildup. This action will also provide better engine braking.