From what I have read after my little problem, under 100k you "should" be ok. after 100k dont mess with it. now I am FAR from an expert here. I have done lots of reading on this subject since it cost me a new tranny.... too bad I did not do the reading BEFORE I told the shop to change the tranny fluid.... o well at least i know that my tranny is going to be very solid from here on!