Agree with Gregory, in my case, transmission fluid has been changed at 75kil, with Wynn's fluid (equivalence) but according to trany shop specialist the ol process is determinant to get a full success. Feel like the DYI fluid changed is risky business... Mine, specialiste used specific machine to clean 100% of oil + torque convertor....they used wynn's fluid (equivalent) http://www.wynns.ca/pages/english/e_companyprofile.html
http://www.wynns.ca/pages/french/f_m...rans.asp....so far 300miles later no problem.....and the 1@2 hard shift is better but not resolved since then....specialist was explaining that there is an electric signal in the tranny ( don't remember the name) that's getting weaker with time...creating this problem...but oil changed in my case helped....oil was so dark .... Can' t believe that life time BMW oil is real... Was not in my case...however as for the oil differential mine, after 75kil was like new.

__________________
2006 X5 4.4i premium, Sport package ,Winter Package, Sat Nav. AFE Power stage II Production : 08-2006
2012 BMW 128I Convertible Black
2011 Mercedes Benz B200 sold