My brother and I test drove an '06 3500 QC with the 48RE. He owns an '03 2500 QC 6-speed and I have an '04. 5 3500 QC 6-speed. Neither of us really like automatics (torque convertors cost money and the lack of control compared to a 6-speed) , but we were both quite impressed with the 48RE in the '06. It was quick off the line and squealed the tires pretty easily. I've read on the websites that the 48RE seems to be holding up very, very well but I was just wondering if anyone here went from a 6-speed to the 48RE and is just as happy or happier with the change. Any major issues when towing? The '06 has a "Press the button once for Tow/Haul, twice for Overdrive Off" feature. Is this new? Thanks for your comments.