i have 93 camaro z28 a4, just yesterday i was turning left out of the school parking lot and i heard a clunk from the rear end, it ONLY happens when i am accelerating from a stop in first gear, after that its fine, if i ease onto first and then take off a little more as soon as it hits 2nd its fine, no noise on the slow down either, any ideas what this is? i just got the car about a month ago so i dont know past history, it is, however, all stock.