Side to side sway at higway speeds.
 

I have a base 986 and when I get above 55mph or so it sometimes will begin to sway from side to side. This isn't something that happens every time I drive, but it comes and goes. I haven't taken it to a shop yet but I suspect that it may be an issue of uneven wear in the rear shocks. This is my 1st Porsche and I have no clue where to begin, but I would rather ask questions here, than to be RAPED at a mechanic without any info.

*its a 98
*it has aftermarket 19" wheels
*its got a salvage title, but the frame has been professionally straightened

http://a4.sphotos.ak.fbcdn.net/hphot..._2091084_n.jpg

Is this new? Or have you experienced this since the frame was straightened???

I had the same problem but at about 75mph. I had 4-wheel alignment, didn't help. Although my rear struts need to be changed I put on some new rear tires and it solved the problem. Hope that helps.

are you sure it's a sway as a result of the car itself and not just following the "ruts" that are dug into the roads by most other traffic that is slightly wider than the boxster?

i notice on some older roads that have not been repaved in quite some time i can ride in one "rut" or the other, but not both and this causes the car to feel like it's kind of going from side to side in the lane...

what kind of tires do you have? same tires front & rear?

Its a combination of your tire tread pattern, and the ruts in the road surface, most likely.

BC.

When I first got my '04 I thought it was the wide tires that caused it to follow the ruts in the highway. The tires front to back didn't match, but I don't know how much difference that made. Once I got new tires the problem was completely gone.