How Often Should I Check My Rear Differential Fluid

Proper lubrication of the differential gears will even extend the life of your drive-wheel tires.

Routine Fluid Checks and Preventative Maintenance

The differential allows the drive wheels in your 2WD or 4WD car, truck or SUV to turn at different speeds. Proper lubrication of the gears is imperative for the safe and optimum performance of your vehicle. Checking the rear differential fluid every 15,000 miles for a "gummy" consistency will prevent costly repairs and can even extend the life of your drive-wheel tires.

Todays Vehicles Are Designed for Low Maintenance

Todays automobiles last longer. Technology has given them more sophisticated engineering, cleaner-burning fluids and low-maintenance designs. Frequently checking the differential fluid is unnecessary because of these advances. Checking the fluid during 30,000- and 60,000-mile maintenance visits is more than adequate--with a complete fluid change at 90,000 miles.

Bottom Line

While preventative maintenance is the key to the life of your vehicle, you can avoid spending unnecessary time by simply checking the fluid during each oil change. If you have an older vehicle that is used for towing heavy loads long distances, checking the fluid every 15,000 miles or so is recommended. If you are driving a newer vehicle--one that is five years old or less--a check of the fluid during 30,000- and 60,000-mile maintenance visits will suffice.