im stumped , it sounds like its comming from the psgr side rear end , i recently had my axle shaft replaced on that side beacause it was making a knocking noise and was bent , well its still knocking it after replacement , the noise pretty much only occurs when u let off the gas and coast , the slower the car the slower the knock but it seems when the car is almost stoped the knock is most noticeable noise wise , i checked everything and its all tight , what could it be something going bad inside the diffrential ? braking doesnt matter it does it with or without braking , doesnt do it with the car jacked up in the air , doesnt do it in R ,turning has no effect either