Skip the auto shop - Our mechanics make house calls

Q: Differential Noise

asked by on

Hi, I recently purchased a bmw. I started hearing a whining/grinding noise coming from the car when I accelerate. It seems to be coming from the back but I am not sure. After extensive research I believe it is the differential. However I would like to know is there a possiblity that changing the oil in the differential could make the noise go away or would I have to replace the whole differential. The whining/grinding noise is very loud.

My car has 160000 miles.
My car has a manual transmission.

Hello. The noise you are hearing could very well be the differential. The fact it becomes worse when you accelerate is a good indication. The best way to tell is simply to do an inspection. Changing the oil regularly is the best way to prolong the lifespan of the differential. Once enough damage has been done, you will need to replace it. The noise sounds like it has significant damage. The differential wouldn’t make a grinding noise otherwise. You can drain and inspect the differential, but you should be ready to make the full repair need be. Otherwise you will waste differential fluid having to fill it up and take it to the shop. Our mechanics do make house calls if you get yourself in over your head.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Why is my car not accelerating?

This may be a sign of a failing throttle position sensor. The throttle position sensor (TPS) is a sensor used to monitor the throttle position of the throttle plate inside the throttle body in relation to your foot position on...

Q: Abs problem 2002 BMW 320i

Hello - I think you may have a problem with one of the high-pressure valves or the control circuit for the left, rear wheel. Your symptoms suggest that the ABS pump works fine, but is unable to pressurize and pressure-modulate...

Q: Please help My car just stopped accelerating in drive and in reverse what is the problem?

If your vehicle will no longer apply engine power to the wheels while in forward or reverse gear, the transmission will most likely be the cause of this issue. It is possible that this issue is computer, hydraulic, or mechanical...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.