Vehicle Speed Sensor: Service and Repair

VEHICLE SPEED SENSOR (VSS)

Caution: The VSS is located on the right side of the transfer case just ahead of the rear propeller shaft and very close to the exhaust pipes. Be sure that the exhaust pipes are cool enough to touch before trying to remove the VSS. If the pipes are hot, you could be burned.

Removal Procedure
1. Disconnect the negative battery cable.
2. Disconnect the VSS electrical connector.
3. Remove the bolt and the clamp securing the VSS in place.

Important: Have a container ready to catch any fluid that leaks out when the VSS is removed from the transfer case.

4. Remove the VSS from the transfer case by wiggling it slightly and pulling it straight out.

Inspection Procedure
1. Inspect the electrical connector for signs of corrosion or warping. Replace the VSS if the electrical connector is corroded or warped.
2. Inspect the VSS driven gear for chips, breaks, or worn condition. Replace the VSS if the driven gear is chipped, broken or worn.
3. Inspect the O-ring for wear, nicks, tears, or looseness. Replace the O-ring if necessary.

Installation Procedure
1. Install the VSS in the transfer case with the notch for the connector facing the rear.
2. Secure the VSS in place with the clamp and the bolt.

Tighten:
Tighten the bolt to 16 N.m (12 lb ft.).

3. Connect the VSS electrical connector.
4. Check the transfer case oil level. Add fluid if necessary.
5. Connect the negative battery cable.