Hey guys, I just bought a 2006 f350 single rear wheel 4 door auto last week. I had a 7.3 at one time and loved it but now moved up to this. Doing EGR delete and fuel pressure upgraded spring next week, did a leveling kit and 4'' turbo back exhaust this week. I just have a few questions for you guys. After purchasing it I kinda noticed a few things. From a dead stop the tranny shifts 5 times which would that make it a 6 speed auto? Also, with no trailer or any type of load going up hill or just accelerating after say 60 mph the whole truck kinda jumps. Like the rear end is going over a bunch of small speed bumps. One more thing, after around 40 mph or so you can hear a noise in the rear of the truck. Not a whining or howling. Cant really explain the noise, kinda like a steady errrrrrr lol. The noise goes away when you let off the throttle. Not sure if this is in the right section or not, sorry if it is. Any help is appreciated. Thanks!!