Car shakin'at 120 kmh (rpm 2650)

[knijn2007]

My Forester MY00 2.o S-turbo AT shakes when i'm doing 120 kmh and try to accellerate slowly. It accellerates slowly. If i floor it, there's no problem. Of course no CEL light, so no data to read !

 

Any facts/opinions/possibilities will be greatly appreceated !

 

Knijn2007

Holland

[idosubaru]

have the tires checked, you may have lost some wheel weights and your balancing is off.

 

after that i'd check the ujoints on the driveshaft if it's AWD. best way is to drop the shaft to inspect. sometimes you can tell a bad ujoint with the shaft on the car, but if it's not really bad it can be hard to check without actually pulling it off (or at least one end so you can work the ujoint by hand).

[seattlelegacy]

have the tires checked, you may have lost some wheel weights and your balancing is off.

 

after that i'd check the ujoints on the driveshaft if it's AWD. best way is to drop the shaft to inspect. sometimes you can tell a bad ujoint with the shaft on the car, but if it's not really bad it can be hard to check without actually pulling it off (or at least one end so you can work the ujoint by hand).

 

I'm going to bet on something simple like a wheel bearing or tire imbalance. I have had very similiar symptons in my legacy with a wheel out of balance. I also rotated tires at that time and it was smooth as silk afterward. In my old saturn, I had a bad wheel bearing that went nuts at about 65 mph.

 

If it's related to speed more than RPM, take the above mentioned route.

 

Get back to us and let us know what fixes it.

 

Jordan

[AlpineRaven]

yes get the wheel balanced - that is the first thing i would do! um.... have you been off road recently? sometimes it has mud in the rim and causes shaking..

Cheers

AP