PJRACER, Do you know if yours is cable from the transmission or electronic (wire from the transmission)? If the odometer works but not the speedo, it sounds like a faulty speed gauge in the dash. Bummer! I hate working under the dash.
My 92 RT had neither odometer or speedometer working, but I fixed it with a new electronic sending unit on the tranny for about 40 bucks. It does not sound like yours will be that easy.
Don 92 RT Independent