coming home last night down a serious BFE road, start hearing a fast thumping noise when i hit rough spots. check if tire is flopping, no. keep going. get home, pull my right rear tire/wheel back and forth and the whole thing shifts, i feel in the shock boot, and it's all effed up. i do believe i blew out my shock, i know it needs a new on and it will be done ASAP but how much can i expect for repairs on this? thanks a lot......BTW ('97 legacy)