However, if you are determined to do it yourself, here's a general outline. Remember, this is a general guide and may not be entirely accurate for your specific Durango model (e.g., 2WD vs. 4WD, engine type will affect specifics). Always consult a repair manual specific to your vehicle's year, make, and model. A factory service manual is your best resource.
Before You Begin:
* Consult your owner's manual: This will provide specific information about your transmission fluid type and capacity.
* Gather supplies: You'll need the correct type and quantity of transmission fluid (check your owner's manual!), a new transmission filter (if applicable - some models don't have a filter easily accessible), a drain pan, a wrench for the drain plug, a torque wrench (critical for proper tightening), jack stands (never work under a vehicle supported only by a jack), funnel, rags, and possibly a pump to refill the transmission.
* Safety first: Wear safety glasses and gloves. Work in a well-ventilated area.
Procedure (General Outline - Consult your manual for specifics):
1. Warm up the transmission: Drive the Durango for 10-15 minutes to warm the fluid. This makes it flow more easily.
2. Secure the vehicle: Jack up the Durango and securely support it on jack stands.
3. Locate the transmission drain plug: This is usually located on the bottom of the transmission pan. Your manual will show the exact location.
4. Drain the fluid: Place your drain pan under the drain plug and carefully remove the plug. Let the fluid drain completely. This may take some time.
5. Remove the transmission pan (if necessary): Some models require removal of the transmission pan to replace the filter. This often involves removing several bolts. Be careful not to lose any of the pan's gasket material.
6. Replace the filter (if applicable): If your Durango has an external filter, replace it with a new one.
7. Replace the transmission pan gasket: Use a new gasket when reinstalling the pan. Use a sealant as instructed by the gasket manufacturer.
8. Reinstall the transmission pan: Tighten the bolts evenly and to the manufacturer's specified torque.
9. Reinstall the drain plug: Tighten the drain plug to the manufacturer's specified torque. Do not overtighten.
10. Refill the transmission: Using a funnel, carefully add the correct amount of transmission fluid. Your owner's manual will specify the correct fluid type and capacity. You may need to use a pump to fill the transmission if the filler is not easily accessible.
11. Check the fluid level: Most Durangos have a dipstick to check the fluid level. Check the level with the engine running and the transmission in Park (or Neutral). Add more fluid if necessary.
12. Lower the vehicle: Carefully lower the Durango from the jack stands.
13. Test drive: Take the Durango for a test drive to ensure the transmission is shifting properly.
Important Considerations:
* Fluid Type: Use only the transmission fluid specified in your owner's manual. Using the wrong fluid can severely damage your transmission.
* Torque Specifications: Using a torque wrench is crucial to avoid damaging the transmission pan or drain plug.
* Multiple Fluid Changes: A complete fluid change often requires multiple drain-and-refills to fully flush the old fluid. This is often done by driving between drain/refill cycles.
* Professional Help: If you're unsure about any part of this process, it's best to take your Durango to a qualified mechanic.
This information is for guidance only. Incorrectly performing this procedure can cause significant damage to your transmission. Always refer to a repair manual specific to your 1999 Dodge Durango for accurate instructions and torque specifications.
