So my driveshaft gave out yesterday...I was on my way to the Nurburgring with my buddy and I started to get this weird vibration. It was random and would come and go and I wasn't sure what it was. Finally the car started to vibrate so violently that I had to pull over and could no longer drive the car...not even in first gear at 5mph. It was so violent it shook every part of the car and if I hadn't been going so slow I might not have been able to control the car. There was a metal on metal grinding sound that I thought for sure the driveshaft had come apart. I couldn't get under the car to see because I was on the Autobahn. I had to pay about $700 for a tow back to my house...5 hours in a tow truck sucks. I got the car up on the lift the following day and I could see nothing wrong with the driveshaft. There wasn't a mark on it and everything looked fine. With all the grinding noise I expected to see damage. I checked everything, pinion angle, made sure all the bolts were properly torqued and everything was perfect. The car was up on a drive on lift with a separate sliding lift so I could lift the rear and get the wheels turing to see what was going on. I had a friend get in the car and put it in gear and get the wheels spinning and sure enough the grinding and shaking was still there. Even though I couldn't see any damage I think the U-Joint failed. It almost sounds like there is grinding going on inside the driveshaft like something failed inside but I am almost 100% sure it is a problem with the U-Joint. I will be contacting Lethal Performance as I ordered the driveshaft through them. It had less than 3000 miles on it and up until it failed it was smooth as butter and I loved it. I have never launched the car and I do not drag race. It just failed while I was cruising down the Autobahn (freeway). I'll keep you guys posted on what Lethal does about the issue. I hoping they refund my money completely as I am probably going to stick with the stock shaft for a little while longer. It is a lot heavier but it is smooth. I am also worried about warranty if an aftermarket shaft fails. I have the stock driveshaft back in and everything is fine.