I'm up to almost 132,000 with my original tranny and motor. I did however put the largest Tranny cooler that discount had on my car at around 70,000. I think that helped alot myself. It still shifts about the same that it always has. I think it may even have the original fluid in the tranny. I haven't changed it since I got it at 59,738 miles because of constant lack of funds. I did however get the stuff to do it finally a few days ago, just haven't had a chance to do it until later today. Mine is a 99 LX with vulcan engine if you are wondering. One thing that probably helped with the fluid being so old is that it was low on fluid when I got it, and I added two quarts of fresh fluid. That probably bought me a little more time on that fluid. It doesn't smell burnt, I check it all the time.