I have a 1998 S70 Base. I notice that while I am driving on the highway and get around 55mph my car starts to shake and wont stop until i get over 60mph. I was wondering if anyone else has had this experience or know what the issue may be?

Thanks

 

Start with cking tire balance and look for bent rims, out of true tires, etc...

 

in my old car at one point the brake rotors were a little warped and it had a noticeable wobble at highway speeds. but it got worse when applying the breaks and you probably would have already noticed the correlation there.

 

I have noticed a little shaking while braking as well, perhaps an issue with the brakes than.