Skip the auto shop - Our mechanics make house calls

Q: Very Loud Knocking noise from left rear wheel when turning left and braking

asked by on

I have a 1999 Ford Explorer, I am almost positive that it is all wheel drive (I know it has 4-by capabilities but there is no control to turn on 4 wheel drive). About 8 months ago it started to make a quiet knocking noise from what sounds like the rear left wheel, but only when I was turning left sharply and at moderate speed. As time has gone on, the knocking has gotten much louder and more frequent. Now it does it anytime I turn left (sharp turns and wide turns) and it has started to do it when I'm braking too. If I'm going very slow, it won't make the noise but anytime I'm doing more than 20mph or so, it will knock. We had a mechanic look at it and they said they think it is transfer case going out, but he was unable to explain why he thought that and it seems wrong to me because it doesn't make the noise all the time or when I'm turning right. Any advice would be much appreciated. Thank you.

My car has 346000 miles.
My car has an automatic transmission.

A: The problem could be in the transfer case u...

The problem could be in the transfer case unit, but the device is mounted closer to the driver than the rear wheel so the noises or vibrations are generally a little more obvious. Especially during sharp turns the transfer case and rear end assemblies are working pretty hard with the wheels turning at different rates. I suggest hiring one of our mobile experts to diagnose the noise you’re hearing. Wheel bearings and worn out suspension components like sway bar links cause similar noises.

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: I want to replace my Ac compressor clutch

The job will require the compressor to be removed from the vehicle. This requires the refrigerant to be reclaimed and after the compressor is reinstalled it will have to be evacuated and recharged. If you do not have the tools...

Q: Car hood won't open

Hello. Overtime hood springs will loose the ability to force the hood up when the hood latch is pulled. It's best to have an extra set of hands when trying to get it open so one may pull the hood latch...

Q: How do I turn on or turn off the sound system?

To turn on your sound system, press the Power/Volume button. Press this button a second time to turn off the sound system.

Related articles

What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
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.