So I'm new to this site...but I've gotten some good information from reading many posts here, in the past. I own a 2001 beetle sport 1.8l turbo...I've owned the car for approx 7 months, when I bought the car it had a bad exhaust (various leaks and rusted out areas) but the car always ran gr8. 2 days ago I had a new exhaust put on. I had driven about 20 mi when the car began to shake and vibrate under acceleration (most notably ) in 2nd and 3rd gear.. It felt like I had a loose wheel, but after driving it awhile I became aware it only happens when I accelerate and/or put a load on the engine.. Does anyone have any idea what this could be? I'm retired living on SS. Needless to say I don't have hundreds of dollars to throw at this....thank you