The problem is people wait too long before they change the tranny fluid. NO fluid is lifetime, NONE...not even ZF's mythical Esso. 4 personally owned BMW's (countless customers cars that I've done), every 50k like clockwork, never a failed tranny yet...period. It's all nothing but opinions out there about the people results of changing fluid, but we never know how the tranny was treated by each individual user.

What most don't consider is that maybe it was already failing because they abused it - stop light racing everytime, Reverse to Drive w/o coming to a complete stop, hard driving on a cold engine instead of letting the engine AND tranny get to temperate via driving slowly AT THE SAME TIME (aka garage warmups that turn into immediate hard driving while the tranny is still cold). Most people wait until they get the slamming hard shifting before they address the problem. I personally am for preventative maintenance and don't believe in the "If it isn't broke don't fix it" mentality. Regardless of various peoples driving habits, personal maintenance beliefs, etc, one thing remains constant regardless of opinion...NO fluid is lifetime.

__________________