Originally Posted by geneatals
just had my diff oil change for the grinding/thumping noise described with tight cornering, pronounced with initial driving (cold start). Too soon to tell if it works, but haven't noticed and it's only been 2 days. Would like to know what else was done to remedy the noise if the diff oil change doesn't not work...
My service advisor told me that he's seen BMW NA request another diff flush with the same "new" oil, while in other cases they have authorized the replacement of the differential. It seems to be situational on how well the diff oil flush/replacement works.
Mine was better when I picked it up from the dealer, although still "clunky" at times. It progressively got better, but I still hear it sometimes
when the diff oil is cold.