Differential Fluid Change Cost and Interval (Front and Rear)
Differentials cause the wheels of a vehicle to turn at different speeds, especially when going around curves. Every vehicle on the road is equipped with a differential. Some automakers install the differential at the front, others at the rear. Differentials can also be built into the front and rear axles.
Like an engine, a differential needs lubricating fluid (oil) to operate smoothly. Unless your vehicle has a transaxle transmission, the front and rear differentials typically use the same type of fluid.
In this case, the front differential uses full synthetic oil and the rear differential uses a thicker oil. Your local repair shop can recommend the best oil for your differentials.
Differential Fluid Change Cost A differential fluid change is more expensive than an engine oil change. A front differential fluid change can cost between $70 and $130. This includes an estimated labor cost of about $40 to $60 and an estimated parts cost of about $30 to $70.
If you are replacing the rear differential fluid, the estimated total cost is slightly higher, between $80 and $150. This includes a labor cost of $50 to $70 and a parts cost of about $30 to $80. Such total price will include additional taxes and fees.
When to change differential oil
Front differential
The best way to find out the exact number of miles you should drive before you need to change the front differential fluid is to consult your car’s owner’s manual. Most manufacturers recommend changing the fluid every 25,000 miles, while others recommend a 30,000-mile interval.
If your front differential has a transaxle installed, you may also need to change the fluid every 20,000 miles. This is a very technical process, so it’s best to have a trained auto mechanic perform this task.
Rear Axle Differential
Generally, most automakers recommend changing the fluid after at least 30,000 miles, but some allow up to 50,000 miles.
Unless you’ve had your car serviced at the dealership where you bought it, the mechanic probably won’t tell you when it’s time to change the fluid. It’s up to you to keep track of how many miles you’ve driven since you last changed the fluid.
Things to keep in mind
If you’re going the cheap way and trying to change it yourself to avoid labor costs, be prepared to get your hands dirty. After you drain the fluid or transmission fluid from the differential, you’ll need a large pan to catch it. Please wear clothes that you don’t mind getting dirty.
Once the fluid has drained into the oil pan, pour it into a safe container and take it to a quick-lube facility, auto repair shop, or hazardous materials facility for proper disposal.
Finally, be sure to clean any dirt from the other housing parts of the differential. The gaskets will also wear out and you’ll want to install new ones.