When i take off from a dead stop or when im not on the gas moviing and i hit the gas not hard but not really really soft i hear this loud CLICK i also hear it when i have the car in gear (not running) if i lay down near the rear and push the car forward and back i hear it sounds liek tis comin from the rear end but i cant figure it out all teh mroe skilled techs i know all say sounds liek a U joint but both feel fine i did replace the one in the front when i got the car anyone have ideas?