So my final drive large crown bearing blew out on me a week ago yesterday, and after destroying one bearing in the process, I finally have everything back together. The big bearing was the only thing that was destroyed so everything else stayed the same (taper bearing etc...) So I started checking the preload with the assumption that if it was preloaded from the factory correctly, there is no reason that value should change, right??? So using the method many have used using a dial indicator and moving the crown gear up and down inside the housing, I determined the shim value that I needed was a 0.5mm shim. Now here is the kicker, I pulled out 0.85mm in shims (one .70mm and the other .15mm). I have a hard time believing that BMW would over load the preload value by 0.35mm??? This might explain the failure at only 79000 miles though. Hoping someone on here has noticed a similar amount of excessive preload and has had successful mileage after correcting it. Is 79000 a bit pre-mature on a bearing failure?