Vibration starts over 35mph???

[SnoEclipse]

awd or fwd?

Don't overlook wheel bearings too. Pretty much any weight-bearing part of the car could have settled, flattened, stuck, etc, etc over the past 4 months.

[LaunchHard]

In vacuum as in full vacuum, or in vacuum as in just not boosting?

If it's full vacuum, you're engine breaking, and it could be due to the weight shift. Just a thought.

Vacuum as in my foot is off the gas while my car is in gear, primarily 4th and 5th.

[LaunchHard]

if it's shaking so much, why are you driving it at all? My guess is tires, but flatspots don't happen from sitting for a few months, my quest sat for two years and it drove with no shaking or anything.

Im not driving it all over, i just took it around the block to get a feel for the symptoms.

[LaunchHard]

awd or fwd?

Don't overlook wheel bearings too. Pretty much any weight-bearing part of the car could have settled, flattened, stuck, etc, etc over the past 4 months.


Its AWD, and i was considering wheel bearing also, but how do i test those??

[FattyBoomBatty]

Ever heard of tire kickers? lol. Grab the tire and see if it wiggles when it shouldn't.

[cmspaz]

Vacuum as in my foot is off the gas while my car is in gear, primarily 4th and 5th.
That's when I first noticed my front passenger wheel bearing causing vibrations, but if it's doing it as low as 35, there'd be better signs of a bad bearing, like noise. Doesn't hurt to check anyway.

That said, I'd blame something at the front of your car, since that's where the weight is while it's at its worst.

[311evo]

I also think it would be flat spots, or something with the brakes sticking or bearing(s).