Hello everyone, I have a 2wd MM and every time i accelerate from a stop I hear a LOUD PING!! And now when i am cruising i hear a metallic noise i dont know how to explain it. Anyways i checked my universal joints for play, one is good and the other not so good...but that is not what i am worried about , when i was rotating the driveshaft i discovered there was play in the diff. . so im wondering if anybody knows what the problem is? Do i have to replace the whole diff or iis there a piece I have to replace in the diff housing. Im not familiar with differentials. Any help is appreciated!