Harmonic vibration through floor and seats

JZAZZARETTI

MEMBER
2003 TOYOTA AVALON
3.6L
6 CYL
FWD
AUTOMATIC
138,400 MILES

We feel a vibration under acceleration from a stop or rolling acceleration. It nearly disappears when I lift off the gas pedal. The steering wheel does not vibrate or bounce.

Within the past year:
1 motor mount and 1 transmission mount replaced
Both rear rims made round again
CV boots checked
Tires balanced and rotated
4 wheel alignment

Great car but annoying vibration that feels like it's bouncing.

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Do you only feel this when the car is in motion? Have you checked tires to make sure there isn't a shifted belt or uneven tire wear? Do you feel the vibration in the steering wheel or the seat and floor?

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Saturday, July 5th, 2014 AT 6:32 PM

JZAZZARETTI

MEMBER
2 POSTS

The Vibration is felt ONLY through the floor and seat. Tires are wearing evenly. ONLY feel The vibration DURING acceleration.

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Monday, July 7th, 2014 AT 5:34 PM

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

If everything is good in the rear, the only think I can think of (other than an engine misfire) is a bad motor mount. And you said you replaced one. Have you checked them since the replacement?

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Monday, July 7th, 2014 AT 7:51 PM