Here's a general outline. Specific steps and difficulty may vary slightly depending on your Durango's transmission (automatic, of course). Consult a repair manual specific to your year and model for detailed instructions and diagrams. A Haynes or Chilton manual would be a great help.
Tools You'll Likely Need:
* Socket set (metric)
* Ratchet and extensions
* Screwdrivers (Phillips and possibly flathead)
* Possibly a pry bar or small flathead screwdriver for prying the connector
* New neutral safety switch (ensure you get the correct part number for your vehicle)
* Jack and jack stands (essential for safety)
* Wheel chocks (for safety)
* Penetrating oil (like PB Blaster)
* Rags or shop towels
* Wire brush (optional, to clean contacts)
General Steps:
1. Safety First: Park the Durango on a level surface, engage the parking brake, and chock the rear wheels. Disconnect the negative battery cable.
2. Access the Transmission: You'll likely need to jack up the Durango and secure it on jack stands to access the transmission. Consult your repair manual for the best jacking points.
3. Locate the Neutral Safety Switch: The NSS is usually located on the passenger side of the transmission, near the top. It's a small switch with electrical connectors. Your repair manual will show you the precise location.
4. Disconnect the Electrical Connectors: Carefully disconnect the electrical connectors from the NSS. They may be difficult to separate; gently pry them apart if necessary. Take note of their positions for reassembly.
5. Remove the NSS: The NSS is usually held in place with bolts or screws. Use the appropriate socket to remove these fasteners. Penetrating oil might be helpful if the bolts are rusted or stubborn.
6. Install the New NSS: Carefully install the new NSS in the same position as the old one. Tighten the mounting bolts to the manufacturer's specifications (check your repair manual).
7. Reconnect the Electrical Connectors: Carefully reconnect the electrical connectors to the new NSS, ensuring they are securely fastened.
8. Lower the Vehicle: Carefully lower the Durango from the jack stands.
9. Reconnect the Battery: Reconnect the negative battery cable.
10. Test the Operation: Start the Durango and check that it starts only when the gear selector is in Park or Neutral. Also, test the operation of your reverse lights.
Important Considerations:
* Transmission Type: The exact location and removal procedure might vary slightly depending on whether you have a specific type of automatic transmission. Your repair manual will have the exact details for your transmission.
* Bolts: The bolts holding the NSS in place can be very difficult to remove due to rust and age. Use penetrating oil and patience. If a bolt breaks, you may need to drill it out.
* Wiring: Be careful not to damage the wiring harness during the process.
* Repair Manual: A repair manual is highly recommended, as it provides detailed instructions, diagrams, and torque specifications specific to your vehicle.
This is a general guideline. Always refer to a repair manual specific to your 2002 Dodge Durango with a 4.7L engine for detailed, accurate instructions. If you are not comfortable performing this repair yourself, it's best to take your vehicle to a qualified mechanic. Improper installation could lead to starting problems or other issues.
