I have a 2006 2500 4x4 6spd Cummins. Two weeks ago I replaced my two inch front spacer(Leveling Kit) with the KORE VR HP 2" Kit. While my truck was at the offroad shop I had them order and install the new Dodge steering upgrade kit,no new pitman arm. Also had them install a Defiant steering stabilizer instead of the $140. 00 Dodge one. Driving home on the freeway I noticed wandering and some big bumps made the truck feel like it was skipping somewhat out of control. Next time I dove the truck I went through some gears real quick and got it up to about 85mph, then got on the brakes really hard. The steering wheel and truck shook violently almost out of control! Very scary, then the same thing today. Do I need the 08' pitman arm? Is the stabilizer to stiff/set-up wrong? Never had ANY of these problems before all the new front end parts. I need help!