This one might get the speed reading from the speedometer, I would pull the cluster and clean and check the sensor coming from the speedometer,

Check Wheels Down Cleared to land

__________________
Jerry

2004 SL500 Black 55K Miles
2002 s500 Black 90K Miles
1986 300E Gold 233K Miles
1966 Twin Cessna 320D
1989 Jeep Cherokee 233K Miles
1994 Ford Van E150 399K Miles