I have had my Impala technically since Nov of '11 it has been an amazing car done a few mods to it nothing fancy. I noticed i just had the resonator taken off (seriously thin that has nothing to do with the issue but never know) now it is as if my rear end is wibbling and it is way more noticable at low speeds. once i am higher than 50 it is almost none exsistant to feel. Now i have done some research and seen the rear sindle rod have issues and I am sure they have never been replaced. I also had to do a plug on one of my tires because of a nail and i was told at the last alignment my driver side rear strut is slightly bent but not to the point of needing replaced. what of these could possibly cause the wooble could my alignment be out again it has been 2 years since my last aligment but i have seen no signs of wear on my tires, which should i start with tire, alignment, strut replacement or spindle rod. I am planning after reading to fix the whole rear with new aftermarket parts to improve performance but i am limited on fund cause i am on disability. any suggestions are appreciated.