i replaced my clucth and TOB and all that about a month ago and it works fine but recently when i drive i hear that " rocks in a can" noise . its not too loud but its def noticable. when the car is stopped at idle its fine with clutch in or out but anytime i accellerate i hear it. but it still shifts ok and stuff and grabs tight? anyone know why? the TOB is on right. if i push the clutch in when i am moving it goes away , but soon as i let it out its back .

91 civic hatch, homemade turbo+ LS motor = 12 sec street car.