Here's a general outline of the process. Specific steps and torque specifications may vary slightly depending on your exact transmission type (check your owner's manual). Always consult a repair manual specific to your 1999 Ford Taurus for detailed instructions and torque specifications.
1. Preparation:
* Safety First: Disconnect the negative battery terminal. Use jack stands to securely support the vehicle after lifting it. Wear safety glasses and gloves.
* Gather Supplies: New transmission oil pan gasket (ensure it's the correct one for your transmission), new transmission fluid (the correct type and amount specified in your owner's manual), a drain pan, socket set (including metric and possibly SAE), wrenches, a torque wrench, jack and jack stands, rags, and possibly a gasket scraper.
* Vehicle Positioning: You'll need access to the transmission oil pan, which is usually located underneath the car.
2. Draining the Transmission Fluid:
* Locate the Drain Plug: The transmission oil pan will have a drain plug.
* Position the Drain Pan: Place the drain pan under the drain plug.
* Remove the Drain Plug: Carefully loosen and remove the drain plug, letting the fluid drain completely into the pan. This can take a while.
3. Removing the Oil Pan:
* Locate the Oil Pan Bolts: These are usually located around the perimeter of the oil pan.
* Remove the Bolts: Carefully remove the bolts one by one, keeping track of their location and length (if they are different lengths). Have a container ready to catch any remaining fluid that may spill.
* Lower the Oil Pan: Gently lower the oil pan. The gasket will likely stick to either the pan or the transmission case.
4. Cleaning and Inspecting:
* Clean the Pan and Transmission Case: Carefully clean both the transmission pan and the mating surface on the transmission case with a clean rag and some transmission fluid compatible cleaner. Remove any old gasket material. A plastic scraper can help, but be careful not to scratch the surfaces.
* Inspect the Pan: Check the pan for dents or damage. If it's damaged, you'll need a replacement.
* Inspect the Magnet: Many transmission pans have a magnet to catch metal particles. Clean this magnet thoroughly.
5. Installing the New Gasket:
* Apply Sealant (If Necessary): Some gaskets require a thin bead of RTV (room-temperature vulcanizing) silicone sealant to be applied before installation. Follow the instructions on the new gasket packaging. If it doesn't require sealant, skip this step.
* Install the New Gasket: Carefully position the new gasket on the transmission pan. Ensure it's seated correctly.
* Install the Oil Pan: Carefully lower the oil pan onto the transmission case, ensuring the gasket is properly aligned.
6. Tightening the Bolts:
* Replace the Bolts: Replace the bolts, tightening them in a crisscross pattern (start in the middle and work your way out). Do not overtighten. Use a torque wrench and consult your repair manual for the correct torque specifications. Overtightening can damage the pan or transmission.
7. Refilling with Transmission Fluid:
* Refill the Transmission: Carefully pour the correct amount of new transmission fluid into the pan. Refer to your owner's manual for the correct fluid type and quantity.
* Check the Fluid Level: Most automatic transmissions have a dipstick to check the fluid level. Follow the instructions in your owner's manual for checking the level and adding more fluid if necessary.
8. Final Steps:
* Lower the Vehicle: Carefully lower the vehicle.
* Reconnect the Battery: Reconnect the negative battery terminal.
* Test Drive: Take your vehicle for a test drive to check for leaks.
Remember, this is a simplified guide. Consult a repair manual specific to your 1999 Ford Taurus for detailed instructions, torque specifications, and diagrams. If you're unsure about any step, seek professional help. Improperly replacing the transmission oil pan gasket can lead to serious transmission damage.
