2011 Jeep Grand Cherokee Owner Manual - Page 358

356 STARTING AND OPERATING To reset the transmission, use the following procedure: Torque Converter Clutch A feature, designed to improve fuel economy, has been 1. Stop the vehicle. included in the automatic transmission on your vehicle. A clutch within the torque converter engages automati2. Move the shift lever into the PARK position. cally, at a calibrated speed, at light throttle. It engages at 3. Turn the engine off, and be sure to turn the ignition higher speeds under heavier acceleration. This may reswitch to the LOCK position. sult in a slightly different feeling or response during 4. Wait approximately 10 seconds, then restart the en- normal operation in high gear. When the vehicle speed drops below a calibrated speed, or during acceleration, gine. the clutch automatically and smoothly disengages. 5. Move the shift lever to the desired gear range. NOTE: If the problem is no longer detected, the transmission will • The torque converter clutch may not engage until the return to normal operation. If the problem persists, transmission fluid and engine coolant are warm [usuPARK, REVERSE, and NEUTRAL will continue to operally after 1 to 3 miles (1.6 to 4.8 km) of driving]. ate. Only second gear (3.6L engine) or third gear (5.7L Because the engine speed is higher when the torque engine) will be available in the DRIVE position. Have the converter clutch is not engaged, it may seem as if the transmission checked at your authorized dealer as soon transmission is not shifting into Overdrive when cold. as possible. This is normal. Manually shifting (using the ERS shift control) between 4 (direct gear) and 5/D (Overdrive