Skip the auto shop - Our mechanics make house calls

Q: Knocking noise from lower end of the motor. I was told it could be the flywheel

asked by on

Knocking from the lower end of the motor. I have a video and was told it could be a flywheel
My car has an automatic transmission.

Hi there:

Damage to the flywheel on a 2007 Chevrolet Trailblazer is highly unlikely unless you’re experiencing serious transmission, acceleration or shifting issues. In most cases, a knocking sound will be caused by internal engine components that are experiencing lack of lubrication or by driveline axle components that might be warped or damaged. To be certain, and eliminate the guess work, you should have a professional mechanic complete an engine is making a noise inspection.

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!
  • Home
  • Questions
  • Knocking noise from lower end of the motor. I was told it could be the flywheel

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: Gear shift indicator says the car is in drive

Hi there. There's a retainer clip that adjusts the shift indicator in order to show what gear you're in. A broken retainer clip will throw your adjustment off from showing the correct gear. This broken clip can also jam your...

Q: Put wron transmission oil in the transmission. Now the vehicle has a hard time engaging into drive or reverse

Hi There, Depending on the type of transmission fluid you put in the vehicle, it may not have had the proper formula in it to prevent the transmission from slipping which is what is causing it to have to rev...

Q: Oil pressure

The oil pressure should never read "0." It will be very low, usually around 15-20 psi, but should never be "0." There are a number of factors to consider in terms of oil pressure such as the viscosity of the...

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...
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...