94' Volvo 855 Turbo Vibration

henrysin44 · Post by **henrysin44** » 15 Oct 2019, 04:13

Long story but I think context is needed for my question. About a month ago I did something really stupid, while I was driving on the highway I got my phone out to get directions to where I was going, started to pay more attention to my phone than the road....when I returned focus to the road I realized all traffic had halted and I was going 75mph towards a non moving Honda. I slammed my breaks and cut my wheel towards the break-down lane, my brakes were locking up and that caused my car to drift into a concrete barrier (drivers side). It wasn't head on, my car was parallel to the barrier at impact, no damage was done to my volvo, literally not even a scratch. Although it was a pretty harsh impact, gave me a concussion and whiplash.

After the crash I drove away but my alignment was thrown way off and a non harmonic consistent whole car vibration is felt at 65mph and over. Not harsh, almost as though a tire is unbalanced. I have inspected the front and rear suspension, checked the tires(and wheel weights), and had my alignment done at Firestone with final results all in-spec and I still have the same vibration.

Anyone have any idea what could be causing my vibration? Its driving me nuts, although i'm suspect of the tires, at low speeds, 40mph and below i can feel a light thumping that will match how fast i am going.

Post by **abscate** » 15 Oct 2019, 04:50

You could have damaged a CV , wheel bearing, or bent a lower control arm.

Check both front and rear of course.

Post by **RickHaleParker** » 15 Oct 2019, 05:23

Bent wheel or shifted/broken tire belt?
Did you have the wheel balance checked?

henrysin44 · Post by **henrysin44** » 10 Nov 2019, 02:22

I've checked the tires out and found that the drivers side front does has inner wear, I do know the drivers side strut tower bearing and mount is shot so I am assuming that is causing the tire wear. I have replaced everything but the wheel hub and end-links in the front suspension, and all the parts I replaced were OE and Maylee parts back in June and the parts still pass the tests. I think one of the front wheel bearing is toast, along with what I mentioned above the steering wheel now shakes with the vibration and on low speed turns to the left a horrible high-pitched sound comes from the front, almost like the sound of brakes pads worn down to the wear indicator.

This week I'll be investigating my brakes due to the brake light coming on under hard braking and hopefully I'll find my wheel bearing to be worn out.

abscate wrote: ↑15 Oct 2019, 04:50 You could have damaged a CV , wheel bearing, or bent a lower control arm.

Check both front and rear of course.

I replaced both CVs over the summer, although the passenger side shaft I got for free new in box (came with a free 850 lol), but a brand that looked as trustworthy as URO parts so If other components check out I'll swap that shaft.

RickHaleParker wrote: ↑15 Oct 2019, 05:23 Bent wheel or shifted/broken tire belt?
Did you have the wheel balance checked?

The wheels are ok just some curb rash, I didn't get the balance checked as the vibration has been getting worse across all speeds sense my initial post and now want to investigate the suspension more before having to spend $60 for a balance, i am going to see what rotating my tires does to the vibration soon.

Post by **abscate** » 10 Nov 2019, 04:37

I’ve never had any luck telling a bad from good bearing by inspection, unless it was really gritty.

I’ve got a bad boy on my bench right now that feels like new. The noise on turn test sounds definitive , though, noise on left turn = bad right front wheel bearing