* Automatic Transmission: The VSS is usually located on the output shaft of the transmission, near the tail housing. You'll likely need to get under the van to access it. It's a small sensor with one or two wires connected to it.
* Manual Transmission: On manual transmissions, the VSS is typically located on the top of the transmission case or on the extension housing near the speedometer cable connection. Again, access will likely require working underneath the van.
To be certain:
1. Consult a repair manual specific to your 1991 Ford Econoline 350: This is the most reliable way to find the precise location. The manual will have diagrams and detailed explanations.
2. Check your vehicle's wiring diagram: This will show you where the VSS wires lead, which can help you trace it to its location.
3. Search online forums specific to Ford Econoline vans: Owners' forums often discuss common repair issues, and you might find someone who has already identified the sensor's location on a similar model.
Remember to disconnect the negative battery cable before attempting any work on the vehicle's electrical system. Always use caution when working under the vehicle and support it properly.
