I just did a wheel bearing / hub replacement on the front passenger wheel because the old one was shot but now I have a new problem. (mechanics.stackexchange.com)
From the description provided, it appears that the symptoms are due to the leak in the brake system that you found in the rear passenger wheel. (yourmechanic.com)
Not confident enough to make it an answer, but it was due to a crack in the chassis near the front, passenger wheel causing some flex. (mechanics.stackexchange.com)