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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Rear End Differential Fluid

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: What is this part called ?

The round disc you see is just a rubber plug that covers the access port to the transmission torque converter drain plug. If you are leaking oil from this location you will need to first see if it is engine...

Q: I drove without coolant for about 20 miles and the radiator fan is making a loud noise, how do I fix it?

There could be problems with your water pump, coolant lines, radiator overflow reservoir or the radiator that is causing a serious leak. Driving without coolant for any period of time can cause damage to your radiator or other cooling system...

Q: Q: Why is my car accelerating by itself?

This vehicle engine has a manual throttle cable and cannot accelerate by itself. You may have a faulty idle air control valve that can cause a high idle but is limited to only about 1250 rpm. I would recommend having...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...