Car vibrates while driving

[gallydif]

Hello my fellow forum members. Today, I had new shock absorbers installed by my mechanic (sorry for letting my fellow DIY'ers down). All 4 are Monroe- 5801 and 5955. That is it. No new tires, ball joints, etc. Just shock absorbers. The shock absorbers are the correct fit for the model vehicle- '96 Roadmaster.

On the way home there was this terrible vibration and the faster I went, the worse it became. It didn't allow me to go over 55mph as the vibration got so bad. The whole car vibrates including the steering wheel. Even coming off the line from a red light at a slow speed, every time the tire made a full rotation I could feel it. It felt uneven. *This is something new and didn't happen prior to the installation*

Is this normal and means I need an alignment now? Or did new problems besides that surface with this new installation. I've read online it can be alignment, balancing, tire bulge/damage, bad suspension, and motor mounts. Well by doing process of elimination the tires are fine (no bulge/damage) and I don't think it needs balancing as these are the same tires as before.

Please help! Thanks

 

[spasm3]

check all lug nuts. Take it back to the shop.

 

[crazyoildude]

Check the lug nuts before drivng the vehicle and if they are tight check to see if the tires are not damaged..

 

[raytseng]

When taking off tires tech could have knocked off wheel weights and did not notice.

 

[Olas]

Wheels bolt tightness? Wheel balance?

Was any other work done at the same time?

 

[Pop_Rivit]

Return to the shop where the work was done and let them diagnose the issue. There are simply too many variables for an internet forum to "guess" what might be wrong.

 

[gallydif]

No the shock absorbers was the only work done. The back driver side wheel wasn't completely snug so I tightened it up hoping it would be that. Did the test drive. Still vibrating unfortunately so it wasn't that. Could it be a screw for the shock absorber wasn't completely tightened?
The wierd thing is the first 2 miles I drove was fine and then it went down hill from there. Became worse. Like if something loosened up.

 

[03cvpi]

A loose shock absorber would generally just rattle on bumps. I would suspect a ply separation on one of the tires. The tire may not bulge, but you may see the separation in the tread of the tire. The tread pattern would look odd in places. I have seen this a lot on Eagle GT tires after popping a curb or hitting a chunk of debris in the road. Might just want to take it back to who serviced and have them check it.

 

[PatriciaPedersen]

One of the reasons of a car vibrating is that the tire is not in a good condition and the other one is wheel bolt are not tight. I think you should first check those two and if they are in good condition then, you should consult the mechanic.
According to me you should not drive the car unless it stops vibrating because many a times it happens that we don't take such problems seriously and major accidents happen. You can read the post here, which states the importance of checking your car or any other vehicle before you should start driving it.

 

[gallydif]

It was a belt that became separated in the tire. Tire was egg shaped. Thanks everyone.