On my 06 those bolts are seized as well. I doubt very seriously that you will be able to get your bolts out and save the arm. I applied plenty of penetrating oil repeatedly and used my uber powerful impact driver to no avail, My alignment specs are just slightly off so I haven't dealt with the issue yet but the solution is mostly likely going to involve cutting the bolts out and replacing the arms on both sides. Truly a PIA and my guess is that most Ridges suffer from this seizing issue whether or not the owners have any idea!
As to your other issues. Plenty of possible causes for the vibration but its probably either a balancing or tire wear / out of round issue. How worn are your tires?
As to your other issues. Plenty of possible causes for the vibration but its probably either a balancing or tire wear / out of round issue. How worn are your tires?