I changed my tranny fluid this past w/e and what a difference RP makes. My tranny felt as though it had arthritis before now. It was a rather simple change other than trying to manuever the bottleto squirt the fluid in the upper drain plug. I ended up using a small clear tube and attached it to the end of the bottle. I highly recommend doing this if you haven't done so far. I just hit 61k, so I was well overdue.