Hi everyone. I just found this site and hope it'll be of some help with my car. It's a '90 Sable, 168k miles, and tranny fluid is brown. My symptom is identical to what I've read from "LoadedDX". I'd be driving along, cruise on, at about 58mph and around 2k on the tach. Then the car slows (cruise disengages) and when I get back up to the same speed I'm revving 2200 - 2300rpm. First this started when going up small hills. Now it's worse, the problem will appear even if I'm on a flat road and about after 10 - 15 minutes of driving. Have replaced plugs (using Bosch platinums), wires, cap, rotor & O2 sensor. RPM's are also higher at the lower speeds and the engine really over revs to get up to whatever speed I want to go. Hey, LoadedDX, if you're listening did you ever solve your problem? Do I need a tranny rebuild, is there a vacuum leak, could some sensor be acting up? I've been driving like this for about a year and would really like some help. Thanks and sorry for writing so much.