Well I'm not doubting Vortech, but they did minor rebuild on my S-Trim, and it was messed up when I got it back. from them. Everbody was telling me it was going to be loud because of the gear mesh or something, and I waited until I couldnt take it anymore. I pulled it apart and my gears were busted up and even Vortech didnt know what happened. The did fix it for free and even sent me a fully polished unit back instead of my half polished unit. So Vortech can make mistakes also that can cause you a motor. NOONE is perfect. I was lucky because I'm not sure where the metal pieces from the busted gears went. Luckily my car is still running strong. They made everything right.