I'm hearing a low clunck under the car

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Dec 22, 2010 | 04:32 PM

fate167

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Joined: Jan 2009

Posts: 40

From: bronx new york

I'm hearing a low clunck under the car

I've been hearing once in awhile I hear a low clunk when the car is in park has anyone experience this under passenger side.

Dec 23, 2010 | 08:47 AM

TintNinja

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Joined: Sep 2010

Posts: 84

From: Las Vegas

Not me...

Dec 25, 2010 | 08:02 PM

alexdi

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Joined: Jan 2010

Posts: 234

I've never encountered that, but for anyone who finds this thread in the future, it is normal to have a clunk as you pass 20 MPH for the first time after starting up.

Dec 25, 2010 | 10:45 PM

sg1214

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Joined: Dec 2010

Posts: 713

From: Staten Island, NY

Quote:

Originally Posted by alexdi

I've never encountered that, but for anyone who finds this thread in the future, it is normal to have a clunk as you pass 20 MPH for the first time after starting up.

Yea I get that all the time, it never bothered me because I experienced that same exact thing in my dad's car.

Dec 25, 2010 | 10:55 PM

Ghozt

Senior Member

Joined: Nov 2010

Posts: 4,020

From: Maryland

Quote:

Originally Posted by sg1214

Yea I get that all the time, it never bothered me because I experienced that same exact thing in my dad's car.

How different is this klunk at 20 mph from the vibration reported in the TSB's as a fault with the transmission?

Dec 26, 2010 | 07:47 AM

alexdi

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Joined: Jan 2010

Posts: 234

The transmission TSB is a response to the CVT's tendency to lug the engine at part-throttle. This induces a low-frequency resonance perceived as a booming sound. The TSB reprograms the CVT to hold higher engine speeds that won't cause the resonance. The 20 MPH clunk has something to do with automatic brake calibration; it's unrelated.