In May, my main indy mechanic restored my failed AWD. He said we wouldn't know until he opened it up whether cause of failure was sleeve or angle gear. Hoping it was only the cheap sleeve rather than the expensive angle gear, I supplied him with an OEM angle gear sleeve and seal kit (http://www.tascaparts.com/oe-volvo/30787988) before he began work. To my relief, he reported the problem was indeed not the angle gear but just the sleeve and my AWD was restored! For 5 months! Wait, what? Shortly after having my tires rotated recently, I began to hear a speed-related grinding noise. Initial (incorrect) diagnosis: a bent heat shield from wheel dropping on it while rotating tires. Today, though, my backup indy mechanic lifted my R and showed me that where the driveshaft enters the angle gear case the shaft has easy play and there's no seal (angle gear case is slick with oil). My questions: Is it likely that both the expensive angle gear and driveshaft now need to be replaced, or just one or the other? Not that it matters much in comparison, but should I also order another sleeve or is that likely to be okay still? Is it likely just a coincidence that my mechanic replaces the sleeve and a few months later the angle gear fails? If not likely a coincidence what's your theory as to the connection? Should the seal on the rear driveshaft side of the angle gear case have been replaced at the same time as the seal on the front sleeve/transmission side of the case because of the likelihood of the rear side being damaged accidentally or from drying out during sleeve replacement?