I have a 2000 Volvo s40 1.9 turbo it has 93,000 miles on it.
My question is that my car begins to vibrate when I reach 45-65mph.
When I accelerate I can fell the steering wheel shake and it fells like my tires are bouncing up and down. As soon as I let go of the gas, the car runs smoothly as though nothing is wrong.

All the engine mounts and front axles have been replaced.
I thought it might be the tires needed balancing, but I had the tires rotated and balanced and the problem persists.

Thanks for any advise,
Roman

 

I had a similar problem once on one of my previous cars. How worn / old are the brake disks? (Rotors), The problem I had came down to the fact that the disks (Rotors) were warped!! The disks were that bad that every time the wheels rotated it was knocking on the brake pads causing the vibrations, so at 40 - 60 mph the amount of times the wheels turned full cycle the vibration is pretty bad, then obviously felt through the steering wheel!!
Hope this helps.

Finchy

 

You should have the new Axles checked. I have seen new axles go bad and cause the same vibration.

I have also seen the transmission break something inside and give alot of slack on the drivers side where the axle goes into the trans.

 

Thanks for your reply.
I will check the brake disks this week.

Thanks again,
Roman

 

Thanks for your reply.
I founf out that only left axle has been replaced. I'll check with technician who replaced it to chek the both axles.

Thanks again,
Roman

 

Could it be faulty transmission or differential?

 

I have seen the trans break before.

 

When you say trans break, that means transmission needs to be replaced?

 

Yes but if that happened then you would feel SLOP in the Axle where it goes into the trans. Up and down slop not turning slop or in and out.

 

I'm sorry, but i didn't get it. What slop?
All I feel is vibration when i push accelerator after 45mph.

thanks

 

You would have to feel for slop at the trans where the Axle goes into it.