I just installed the same kit last night. I had spent hours watching videos and reading information about installing the towers, so I felt pretty confident I would get the set up right. I was taking my time to make sure I would get this right, and when I finished installing them for the first time, it looked kind of weird to me. I had seen the pics on this link (Yakima Dealer InfoLookup
) (just select grand cherokee and railgrab) and mine did not look like that.
I followed all the instructions so I was thinking I had set it up correctly. Came back to the computer and spent a couple of hours looking for some sites that would provide any guidance. Finally found that you have to use the pin adapter base (without the pin) and the small claw. I thought this was kind of weird bc it wasn't specified anywhere else. I guess in the link above you will see that they do recommend using the pin adapter in the fit information, and then on the Notes below they'll say they recommend using the small claw, but it wasn't very clear.
Anyway, replacing the adapter base was very easy and when I went back to re-install the rack, the towers were still sitting weirdly. The short claw was sitting on the last two notches, so that didn't seem very strong to me. I guess I have to say that I went the lazy way and just unmounted the towers from my WK2 but left the bars on the towers.
Later on, I realized that since I had left the crossbars in the towers, that was causing the small claw to not grab correctly like the pics from Yakima show. I loosened the screw that holds the crossbars in place and repositioned the towers, and finally I was able to sit the small claw like it is supposed to be. Plus now the towers are not sitting too high on the railing.
I am using a 38" fairing like the site recommends, and it helps with noise, although I have not been on a highway yet. I can update later on to let you know how that goes.