2011 Jeep Grand Cherokee Owner Manual - Page 356

354 STARTING AND OPERATING • the engine coolant has reached normal operating tem- If the transmission temperature gets extremely hot, the transmission will automatically select the most desirable perature; gear for operation at this temperature. If the transmission • vehicle speed is above approximately 30 mph temperature becomes hot enough, the "TRANSMISSION (48 km/h); OVER TEMP" message may display, and the transmission may downshift out of Overdrive until the transmis• the TOW/HAUL switch has not been activated; sion cools down. After cool down, the transmission will • transmission has reached normal operating temperature. resume normal operation. NOTE: If the vehicle is started in extremely cold temThe transmission will downshift from Overdrive, to the peratures, the transmission may not shift into Overdrive most desirable gear, if the accelerator pedal is fully and will automatically select the most desirable gear for pressed at vehicle speeds above approximately 35 mph operation at this temperature. Normal operation will (56 km/h). resume when the transmission fluid temperature has risen to a suitable level. Refer to the "Note" under When to Use TOW/HAUL Mode - If Equipped When driving in hilly areas, towing a trailer, carrying a "Torque Converter Clutch" in this section. heavy load, etc., and frequent transmission shifting ocDuring cold temperature operation you may notice decurs, press the TOW/HAUL switch. This will improve layed upshifts, depending on engine and transmission performance and reduce the potential for transmission temperature. This feature improves the warm-up time of overheating or failure due to excessive shifting. When the engine and transmission.