Has anyone had to send in their SC to Vortech to be rebuilt? I am just wondering because 2 days ago I noticed the blower started to sound different. I noticed it when I was driving home. When I rev the engine it doesn't sound like the normal whine, it sounds like the whining hesitates like cuts in and out. It's hard to explain. I've had the SC for 4 years and it has 15,000 mi on it. Any input would be great. Thanks.