F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Vehicle Speed Sensor: Description and Operation
The Vehicle Speed Sensor (VSS) is mounted on the front of the rear axle housing above the pinion flange. The speed sensor ring is located in the rear
axle housing between the ring gear and differential case. The signal from the vehicle speed sensor is not routed directly to the Powertrain Control
Module (PCM), but is received by the Programmable Speedometer/Odometer Module (PSOM), which provides the PCM with a vehicle speed signal.
