Does anyone know for sure what the schedule is for trans and diff fluid. I am positive the Haldex is 30K. I have seen some posts online saying VW claims diff and trans are lifetime and it is not listed in the maintenance schedule. I reviewed the following post on how to do some changes but it seems like they are being done out of diligence, not need.Rear differential should be every 30k or 3 years, and for transmission oil I am not 100% sure, I will check with a friend and see what his documentation says as hes a service guy.