Skip the auto shop - Our mechanics make house calls

Q: Rear End Differential Fluid

asked by on

Today I had my Mercury Grand Marquis serviced by a local mechanic. The mechanic suggested that the rear end differential fluid needed to be replaced. The owner's manual states that the rear end differential fluid never needs to be replaced. Which is correct? Thanks

My car has 83000 miles.
My car has an automatic transmission.

You should only have the differential serviced when you have a leak on the rear cover or an axle seal has leaked and needs replaced. The gear lube should not need replacement unless a problem is present.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Good morning! How much would you charge me for replacing a the two front air bag suspensions and springs?

You can obtain an instant, detailed written quote, and schedule the repair to suit your needs, by visiting YourMechanic’s suspension airbag replacement service page. Once on that page, please click on "Get a Quote" and enter your location (zip code)...

Q: i had a code for bad cam position sensor, i changed it and car still will not start? what else could be the problem

Most of the time when a code is thrown that is related to the camshaft position sensor, the sensor is not the issue. It is possible that the crankshaft position sensor, the wiring for the camshaft or crankshaft position sensor,...

Q: Hey Dave I busted the rear drivers side strut assembly it's hanging down had to get it towed u think it can b fixed?

My strut once broke away (at the upper mount) while I was on I-270. I drove home at 5 MPH, replaced it and kept the car another 15 years until the front sub-frame (holding the lower control arm on) fell...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.