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.

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?
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. Very Loud Knocking noise from left rear wheel when turning left and braking

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: Brake booster heat questions again...

Hi and thanks for your question. The brake booster is vacuum operated and only aids in the stopping force to the driver's foot pedal. If vacuum pressure drops, then the foot pedal feels very firm, just like stepping on the...

Q: Engine stalls when accelerating

The carburetor on the engine may be at fault if it has plugged main jets. The engine does not need too much fuel to rev it up when in park. If you can put it in park and slowly accelerate...

Q: Q: How do I check the oil?

Checking the engine oil is a very important part of having a vehicle. You should check your oil regularly, and always before and after a long drive. Here’s how to check the engine oil: 1. Drive your car to a...

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...
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...