2013 Jeep Grand Cherokee Owner's Manual - Page 464
2013 Jeep Grand Cherokee Manual
Page 464 highlights
462 STARTING AND OPERATING DRIVE This range should be used for most city and highway driving. It provides the smoothest upshifts and downshifts, and the best fuel economy. The transmission automatically upshifts through underdrive first and second gears, direct third gear and overdrive fourth and fifth gears. The DRIVE position provides optimum driving characteristics under all normal operating conditions. range will improve performance and extend transmission life by reducing excessive shifting and heat buildup. If the transmission temperature exceeds normal operating limits, the powertrain controller will modify the transmission shift schedule and expand the range of torque converter clutch engagement. This is done to prevent transmission damage due to overheating. If the transmission becomes extremely hot or is in danger To access all six available gears, you must use the of overheating, the "Transmission Temperature Warning Electronic Range Select (ERS) shift control (refer to "Elec- Light" may illuminate and the transmission may operate tronic Range Select (ERS) Operation" in this section). differently until the transmission cools down. When frequent transmission shifting occurs (such as when operating the vehicle under heavy loading conditions, in hilly terrain, traveling into strong head winds, or while towing heavy trailers), use the Electronic Range Select (ERS) shift control (refer to "Electronic Range Select (ERS) Operation" in this section) to select a lower gear range. Under these conditions, using a lower gear NOTE: Use caution when operating a heavily loaded vehicle at low speeds (such as towing a trailer up a steep grade, or in stop-and-go traffic) during hot weather. In these conditions, torque converter slip can impose a significant additional heat load on the cooling system. Downshifting the transmission to the lowest possible gear (when climbing a grade), or shifting to NEUTRAL
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