Tonight while driving home I noticed that the "Up Shift" light flashed on momentarily. I also noticed that my RPM's were a little higher than normal for the speed I was at; (2200rpm @ 65mph), usually I'm at 1500 to 1600 rpms at that speed. After getting off the freeway, I manually shifted through the gears and did not notice any change from 3rd to Overdrive, the rpms stayed the same. Is this problem hydraulic or electrical? The car runs great apart from this problem which developed this night? What am I looking at more or less? ;help It is an '86 w/ 121K.