What could possibly be wrong with the speedometer in a F-150, 4x4, 1995, 351. Speedometer jumps from 20 to 40 regardless of speed. We have changed the cluster in the dash and speed control sensor in the rear end. Traced wires from speed control sensor in the rear end to where it enters the cab and everything checks ok there. Cannot trace from entering cab to cluster. Does this go thru the ABS controller and where can it be found and will this affect the transmission shifting? Truck is equipped with a E40D transmission and does not have any cables or sensors from speedometer to transmission.
Monday, September 17th, 2007 AT 8:39 PM