I had a issue this week-end while heading to guards. I noticed while driving down the interstate my tach was at about 3 grand (70mph), cause it normally runs at about 1800. This made me a little paranoid, so I slowed down and when I let off the gas pedal the rpms dropped but as soon as I got back on the pedal they jumped right back up to where they were. I manually shifted it from "D" to "3", and there was no change in the rpms nor did I feel any shift in the trans.
When I got home this evening I dropped the tranny pan and changed the filter and fluid. Buttoned everything up topped with fluid, and test drove, still doing the same thing. HELP, I'm not sure what the prob is. The car has 162K. THANK YOU!!!!!