I have a 2007 sc. had it since 10000 miles. I am now at 55000. at 45000 I drained and refilled the transmission with honda atf. fluid looks good and full on the dip stick when I just checked. Problem started at 52000 (right (immediately on the way home) after I had the brake recall fixed by the dealer). The transmission has a hard downshift from second to first. kinda like a slammed shift on a manual but its an automatic. It shifts fine up and down except for that one point when coming to a stop. then it slams down, hard enough to make me cringe. But sometimes it doesn't do it. its seems to do it more frequently when its warm and we've been driving around a lot, but that doesn't seem necessary for it to happen. I have 5k until the warranty is up, but before I head in I was going to change the fluid again. Any other suggestions? Vehicle has had a lot of time on a stop and go rush hour traffic highway. Just looking for thoughts and experiences. My dealer is not so good, pretty sure they will just tell me that my fluid is old and tell me to go away.