Took TG into stealer to have front and rear suspension modifications installed. They called back to say the rear drive pulley bearing was shot. Upon teardown they found other damage: differential assembly, sprocket, both bearings, isolators, etc. The good news is it's all covered under warranty. They know of another 2012 with the same issue, both TGs at about 20K miles. I never noticed any problems while riding, it was smooth and ran very well.