How to PROPERLY Replace Differential Fluid (gear oil)



Learn how to replace differential fluid in your rear differential. This process will also work for replacing differential fluid in the front differential. Check your owner’s manual for your specific vehicle but in general you should change the differential fluid every 50k miles under normal driving conditions and every 25k miles if you tow a lot.

Main steps:
1. Loosen fill bolt
2. Loosen drain bolt (or diff cover bolts)
3. Drain differential
4. Clean gasket material off differential and cover
5. Install new gasket
6. Installer differential cover
7. Torque down differential bolts in a criss-cross pattern
9. Fill differential with the correct spec gear oil
10. Tighten fill bolt to spec

And that’s all there is to replacing the differential fluid!

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47 Comments

  1. I have a 2014 Toyota Corolla does my car have this do I need to do this maintenance in my car? I’m trying to do all the regular maintenance to my car. My car has 120,000 miles. I’m changing the spark plug transmission fluid the coolant the oil. What else did I change or drain? I want my car to 300,000+ miles.

  2. As a dude that's in his 40's and has followed your channel for years, I have always enjoyed learning stuff from you have always stopped to wat h your videos. I wished I had learned a lot of this stuff earlier on in life but, I can still do basic to moderate mechanical work. Heck, I retired from the fire service and got a job at the same municipality as a technician at the city garage lol. I love that job every day too so far. Keep putting up great videos Chris!!

  3. I’d be very careful with a metal pry-bar. You don’t want to gauge the surface of the differential cover, or rearend surface.

    I like to use either a phenolic scraper, or plexiglass scraper. Either is pretty strong, but will not gauge. No need to worry about turning an easy job into an expensive mistake…

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