Driving on flat road with cruise engaged or not, transmission will downshift for no reason (as if I began going uphill). Also idles high at times. Revving up momentarily usually drops idle rpm back to normal level. Both somewhat intermittent but regular. Both began at same time.
Intermittent Idle speed and unwarranted Transmission downshifting on 2004 Jeep Grand Cherokee
by ehunterjr in Marietta, GA on June 28, 2010