[Fulltiming]

If it is the same type unit as used on the 1992's, there could be two likely causes. The sensor near the transmission or the speedometer head itself would be the most likely. Mine has two sensors on a small disk attached to the driveshaft next to the transmission. One sends a signal to the cruise control and one sends a signal to the speedometer/odometer. I have had to adjust the spacing on these sensors before. You should just be able to get a slight tension on something the thickness of a credit card (I prefer to use a plastic hotel door entry card rather than risk messing up a good credit card). The spacing if you have a feeler gauge is 0.03". If the spacing is correct, then either the sensor itself is defective OR the speedometer head has gone bad. The VDO speedometer unit in mine is not repairable. It is electrical so if it suddenly just quit rather than wandering around or pegging, it is possible that a connector on the rear of the speedometer came loose. If the connections are good, you can look online at VDO gauges to find one the same size and style and replace it.

The Speed Sensor on my coach is an ISPro #R-8932 and the Speedometer is a VDO 437152. Can't guarantee these didn't change between 1992 and 1994.