After a wheeling trip about 3 months ago I noticed a metal to metal type of click that happend when I would go up the curb into my driveway. I was stumped as to what was causing it. I check the front cross member (the nuts that attach the lower control arms to the front cross member, which can be seen looking under the vehicle from front to rear). The sway bar endlinks and the brackets to which they attach to the front cross member (located directly under the centerlink. I also check shocks, and upper control arms. Others on this board as well as Nissan4wheelers mentioned the steering stops, but as I looked at the front steering (located looking from the front of the vehicle back just inside the wheels, lining up with the lower control arm) they were grease and I even went as far as to replace them with new ones (the replacement part looks like the head of a nut with a white nylon type insert in the middle)still all seemed okay. But what I wasn't aware of and am shamed of not knowing but there are 4 steering stops (two on each side).
This is the Driver Side Front Steering Stop
This is the Passenger Side Rear Steering Stop
The Passenger side front steering stop and rear steering stops are in the same positions on the other side.
As you can see from the pics I took a large dab of this
and smeared it on both the "ramp" looking part on the inside and on the bolt looking part attached to the wheel.
Hope this helps those who may have similar symptoms.