2010 Jeep Grand Cherokee Owner's Manual - Page 250

STARTING AND OPERATING 249 operating OVER TEMP" message may display, and the transmission may downshift out of Overdrive until the transmission cools down. After cool down, the transmission will NOTE: If the vehicle is started in extremely cold temresume normal operation. peratures, the transmission may not shift into Overdrive and will automatically select the most desirable gear for In high ambient temperatures with sustained high engine operation at this temperature. Normal operation will speed and load, an upshift, followed shortly thereafter by resume when the transmission fluid temperature has a downshift, may occur. The "TOW/HAUL Indicator risen to a suitable level. Refer to the "Note" under Light" will turn off. This is a normal part of the overheat protection strategy when operating in the TOW/HAUL "Torque Converter Clutch" in this section. mode. During cold temperature operation you may notice delayed upshifts, depending on engine and transmission The transmission will downshift from Overdrive, to the temperature. This feature improves the warmup time of most desirable gear, if the accelerator pedal is fully pressed at vehicle speeds above approximately 35 mph the engine and transmission. (56 km/h). If the transmission temperature gets extremely hot, the transmission will automatically select the most desirable When to Use TOW/HAUL Mode - If Equipped gear for operation at this temperature. If the transmission When driving in hilly areas, towing a trailer, carrying a temperature becomes hot enough, the "TRANSMISSION heavy load, etc., and frequent transmission shifting occurs, press the TOW/HAUL switch. This will improve has reached normal • transmission temperature. 5