Skip the auto shop - Our mechanics make house calls

Q: Clunking noise from rear

asked by on

I have a clunking noise coming from the rear of my car when it shifts from 1st to 2nd I just replaced the tranny and it worked fine and shifted through all gears greatly for a week then acted up

My car has 300000 miles.
My car has an automatic transmission.

A: Hi there. This is a somewhat common issue w...

Hi there. This is a somewhat common issue with the majority of the E90's and E46 BMW's. These motors have what is a called a dual mass flywheel which is commonly known for creating this kind of a slight clunk at lower RPM's due to the imbalance between engine torque and transmission torque (common at lower rpm). The flywheel is actually two pieces of steel separated by a very hard piece of rubber, the wind-up in the flywheel can occur when the rubber is loaded then released. It is usually most evident at high torque differential (engine torque mismatched with transmission torque), low engine speed conditions. If you would like to have this diagnosed, consider YourMechanic, as a certified technician can come to your car's location to correctly diagnose the noise.

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・Save up to 30%

Get a quote

What others are asking

Q: Bottome of vehicle makes a helicopter sound when driving at slow speeds

The sound you are hearing is related to the tires moving from what it sounds. The first thing to inspect is proper tire inflation. Tires make strange noises when they are low or damaged. Second needs to be the brakes....

Q: Fuel Injector Replacement, BMW 1988 BMW 325i

Yes, on this model BMW you can replace one injector individually relatively inexpensively. If you are able to afford it and are fairly certain it is an injector problem, I would suggest replacing them all at the same time while...

Q: Car isn't shifting when pedal is all the way down and is slow.

Your engine management system is going into "limp mode" when the Check Engine light is illuminated, reducing engine power, and quite likely, leaving your automatic transmission in 2nd gear. This is why you are experiencing greatly diminished performance. Turning your...

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...