My 2012 E70 with 90K miles start to shake while giving power when doing tide turning at low speed. Find out that is the early symptom of Transfer case failure... Thinking to change the transfer case fluid might help a bit... Can anyone tell me about the reset procedure after the fluid change? I know its not like required but many people said it might help a bit. Is it possible to do that at home also or should I take it to a dealer and let them do it? Thanks for the help!