ok so earlier this year someone ruined my overdrive switch. I finally got around to replacing it and still no overdrive. i checked it with a meter to make sure the switch was good, and it had current flowing through it. then checked both fuse boxes to make sure it wasnt a blown fuse, all fuses were good except the one for my back up lights, but i dont think that would cause overdrive to not work. please someone help me if you can, i have no clue as to what it could be wrong with it. if i didnt do so much highway driving it wouldnt be an issue, but i do drive a lot on the highway and not having overdrive kinda kills the gas mileage which really sucks.

I believe there's a plug you can check for that on the trans itself. Consult this: http://nawdu.de/files/97-99ECB.PDF