Yep the tow/haul button does change how the transmission works. In my '93 Chevy van I just shift to 2nd and watch the glowing tail lights ahead of me and smell the brake linings going away going over a pass.
Desert JK - sorry dude. Took me a while to get the picture done. This is all I have. I know nothing about them, as I mentioned. This coilover is in place of the OEM shock. Sorry its sideways - didn't realize it would post that way. Just tilt your head onto your left shoulder or tip your monitor to the right!!!!