My 08 FX4 stock. Bought used with worn wranglers. That truck vibrated like hell.
I've run dozens of Ford Field Trucks and always LTX so first I put new tires on:
From tire rack:4 Qty. P255/70R-16 Michelin LTX M/S2. $803.51. (2011)
Vibration went away after alingment. Very good all around tire.