I (and the shop) have been working hard at tryign to get the shakes and vibrations out of my 2002 SC2. What we thought was a bad tire or untrue alloy rimnow appeared to be a Service Bulletin issue:
00-T-57A JUN 01 Engine/Powertrain - Vibration at 48 - 54 MPH
See, the front end of my SC would shake mildly at exactly 58 mph, enough to be annoying for an hour long drive to work. This fix required a dampener (strut type) to be mounted from the engine to firewall to better brace the lower engine mounts.
That fixed that issue, but now, the steering wheel vibrates at any speed over 50 mph. This sux, especially when driving for a straight hour to work. The tires have been balanced already, perhaps they need rebalancing?
Has anyone encountered this SB issue? Is it now just a simple alignment/tire balance issue? ThHhAaanNks....