2004 Screw 4X4. I had the goodyear wranglers 18" and put 53K miles on them. At about 35K miles I noticed some nibble and minor shaking. Also noticed the front tires were wearing uneven, every other **** on the tread was wearing on the inside. Had the truck aligned!! Still continue to wear like above. Back to the dealer and they replied truck is aligned correctly just tire wear.

Installed 2"AS leveling kit, 18X9 MM 956 wheels and 325/60/18 tires last week. Look great!! (I'll post pics when I get time to detail the truck) Noticed nibbling in the steering and slight shake from 58 to 68 mph. Also noticed wear on the inside of tire like the goodyears. I increased air pressure in tires to 43 psi. Now vibration and nibble much worse at same speeds. Advice?? I've read several of the threads about the driveshaft problem, but mine never really shook until about 35K miles, thus wondering if other front end issues? Shocks, Brake rotors, steering rack??