I finally got my 52 6400 on the road. Wow what an experience. I've driven so rough riding trucks before but this takes the cake, I love it. It's loud, rough, primitive, etc.. I suspect it very similar to a WWII tank.
Regarding the rearend I'm not sure if I'm currently in high or low. I have a lever and moved it back and forth but nothing happened. I suspect there is a technique but I have no idea what it is. Please help.