How to Change Transmission Fluid in Older Cars with Low Mileage

While modern vehicles often have sealed transmission systems that require fluid changes only at extreme mileage intervals, older cars with low mileage can still benefit from a transmission fluid change. Over time, even with low mileage, transmission fluid can degrade, lose its lubricating properties, and become contaminated with particles. Here’s a step-by-step guide on how to change the transmission fluid in your older car⁚

Materials You’ll Need

• New transmission fluid (consult your owner’s manual for the correct type and quantity)
• Transmission fluid drain pan
• Torque wrench
• Socket set (sizes will vary depending on your vehicle)
• Funnel
• Gloves
• Clean rags
• Jack and jack stands (optional)

Safety Precautions

Before you begin, remember to follow these safety precautions⁚

• Park the car on a level surface and engage the parking brake.
• Wear safety glasses to protect your eyes from splashing fluid.
• Use gloves to avoid skin contact with the hot fluid.
• Never work under a car supported only by a jack. Use jack stands for safety.

Step-by-Step Guide

1. Locate the Transmission Drain Plug

The transmission drain plug is typically located on the bottom of the transmission pan. It’s usually a square or hex-shaped plug. Consult your owner’s manual for the exact location on your vehicle.

2. Prepare the Drain Pan

Place the drain pan directly under the drain plug to catch the old fluid. Ensure the pan is large enough to hold the entire volume of fluid.

3. Remove the Drain Plug

Using the appropriate socket and wrench, carefully remove the drain plug. Be careful not to drop the plug into the drain pan. The fluid will be hot, so proceed slowly and let it drain completely.

4. Inspect the Drain Plug

Once the fluid has drained, examine the drain plug for any signs of wear, damage, or metal particles. Replace the plug if necessary.

5. Remove the Transmission Pan

If your vehicle has a bolt-on transmission pan, you may need to remove it to access the filter and perform a full flush. Refer to your owner’s manual for the procedure.

6. Replace the Filter

If your transmission has a removable filter, replace it with a new one. The filter helps remove debris from the fluid and is important for proper transmission operation.

7. Reinstall the Transmission Pan

Clean the pan and gasket surface thoroughly before reinstalling the pan. Apply a new gasket sealant to the pan and gasket, ensuring proper alignment and sealing. Tighten the bolts to the specified torque in your owner’s manual.

8. Reinstall the Drain Plug

Clean the drain plug and apply a thin layer of thread sealant to the threads. Reinstall the plug and tighten it to the specified torque.

9. Fill the Transmission with New Fluid

Locate the transmission fluid dipstick and remove it. Using a funnel, slowly pour the new transmission fluid into the dipstick tube. Be careful not to overfill the transmission. Check the fluid level periodically and stop when it reaches the “Full” mark on the dipstick.

10. Run the Engine and Check the Fluid Level

Start the engine and allow it to idle for a few minutes. Then, turn off the engine and recheck the fluid level. Top off the fluid as needed to bring it to the “Full” mark on the dipstick.

Maintenance Tips

To keep your transmission healthy and ensure its longevity, consider these tips⁚

• Regularly check the transmission fluid level, particularly after a transmission fluid change.
• Avoid harsh driving habits like sudden acceleration and braking, which can put stress on the transmission.
• If you notice any unusual noises, slipping, or other transmission problems, consult a qualified mechanic.

Changing the transmission fluid in your older car with low mileage can help extend its life and ensure smooth performance for years to come. By following these steps and taking the necessary precautions, you can successfully complete this essential maintenance task yourself.