Skip the auto shop - Our mechanics make house calls

Q: Thunking noise in rear of the car.

asked by on

From a dead stop, when initially accelerating, there is a thunking noise in the rear of the vehicle. It is not the brake calipers, rotors, or brake pads. Could this be the load-leveling shocks deteriorating? This only happens from a dead stop. It does not happen when accelerating while in motion.

My car has 36000 miles.
My car has an automatic transmission.

Hi there, thanks for writing in. This thunking noise is a common problem when U-joints (driveshaft) are worn out. I would recommend having them inspected to be sure they do not have too much play in them. When there is too much clearance in these, they will cause the thunking sound you are describing, especially when accelerating. If there is something wrong with these U-joints, you may need to replace them. If you’d like help investigating the noise or U-joints, have a certified automotive technician come to your home or office to diagnose and repair the issue for you.

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!
  1. Home
  2. Questions
  3. Thunking noise in rear of the car.

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: Ignition replacement 2004 Jeep Grand Cherokee

Hello - the new keys and the security transponder which reads them must be programmed to be "in sync" with each other. You may also find that holding one of the old keys near the dash, while turning the ignition...

Q: Car is making noises from an unknown source. Possible alternator problem?

Remove the belt and check for noise. If the noise is gone, rotate the components that are associated with the belt. Check for smooth operation and noise. Noise that persists with the belt off could originate from inside the engine....

Q: How do I set the hazard indicator mode?

Your remote keyless entry system comes automatically set on hazard indicator and horn mode. During this mode, the hazards lights will flash twice, and the horn will sound once when you lock the doors with the key fob. The hazards...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...
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...