Trans in mine has held up since I no-longer let the dealer service it. I still am extremely irritated by the SLOPPY torque converter and a 400 mile trip can burn the synthetic transmission oil if I put my foot in it to show up some smart elecky furd driver when I have the gooseneck behind it. 7,800 # trailer, 7-8,000 # load on top, but I change the oil and adjust the bands regularly. I had started saving up for upgrades but the blasted cancer and all the surgeries keeping me from working this year shot that to pieces. I would have loved to put in a lower stall torque converter and up grade the transmission, but no $ so not happening. Bottom line is, you can make them last with care, or you can burn them up with a good load and a heavy foot.