While i'm not sure if this is the root cause to my popping noise (ill find out Saturday), I know this has solved a lot of WK/XK owners issues who couldn't track down a strange pop/clunk in their front end.
There's a yoke adjustment on the steering rack. It's used to set the gear mesh during assembly and I can replicate my clunk noise with a pry bar pushing upwards on the driver side tie rod, indicating excessive clearance in the gears at this location. The adjustment is on the driver side of the rack pointing up/forward; you can see it if you look above the sway bar.... though I think 3.7L and 4.7L vehicles you need to remove the oil filter drain guard because that sits over it. I think that, primarily for us lifted guys, we wear our pinion gear down more due to the upward force from the angles associated with our lift kits.
You need an External Torx socket, size E20. (You can get one for $10 off amazon/sears/etc.) or a 17mm socket/wrench depending on model model year.
I'll take some pictures when I do mine this weekend, but here's a diagram:
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