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
109,747 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?

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

+1

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.

Was this

answer

helpful?

Yes

No

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

JACOBANDNICKOLAS

MECHANIC
109,747 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?

Was this

answer

helpful?

Yes

No

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