How To Change Differential Fluid in Five Steps

Follow these steps for a complete differential fluid change in your vehicle that has an independent suspension drive axle.

1. Secure the Vehicle

Start by parking on a stable surface and engage the parking brake. Then, jack up the vehicle with jack stands or ramps, ensuring that you're on the jack points.

2. Drain the Used Differential Fluid

Locate, loosen and take off the drain plug on your differential housing. Allow the used differential fluid to drain completely into your catch pan.

3. Remove the Fill Bolt

If there is a separate fill bolt, locate it and remove it after replacing the drain plug.

4. Add New Differential Fluid

Put fresh fluid into the differential. This may require the use of a pump. Take your time to avoid spillage. Add the recommended amount of differential fluid — if it starts to leak out of the hole, you've got enough. Only use fluids that meet the vehicle manufacturer's differential lubricant specifications.

5. Secure the Fill Bolt

Put the fill bolt or drain plug back on securely. Clean up any spilled gear oil. Lower the vehicle, and you're done. Keep an eye out for leaks when you're driving — drive your vehicle around the block, then recheck the fluid to ensure it's at the correct level. While specific vehicles may require additional steps, these are basics for conducting a differential fluid change. Also, always make sure you properly dispose of the used fluid.