So i just got the car back from my mechanic on friday around 11:30am i had him go over the whole car replaced what needed replacing which was minor things like plugs, themostat, air breather, carb set-up, pion seal, compression, vacuum tests & tires rebalanced. So since the roads were nice and clear +6, i went cleaned her up and went to pick up the better half  as were driving i come to a stop light and stop I looked in my rear view for a sec said babe hold on and SMACK a '07 silverdao just rear-ended me then another smash and another there were 2 other vehicles that hit the silverado that hit me> Well everyone was ok no injuries thank god! the silverado's front end was a mess just criggled and fluid eveywhere the kia suv that hit him was a write off aswell and the camry that hit the kia had a broken bumper. The GP has a lil dent on the pass wing by tail light and now heres were i hope someone can explain this to me...Why does it kinda clunk in the rear as i take off normally or if i stop quick and idea's.????  Thanks for reading..