My 04 Mustang pops when I stop, accelerate, or turn left. I have had 3 mechanics look at it and see what the problem is. I took it to the suspension shop and he greased the lower ball joints and it hasn't helped. The bad thing is that it doesn't do it every time I stop or accelerate. I put new tires on the car and changed the brakes in one weekend, and after I did this the popping started. The mechanics said that the brakes and tires look fine though. Any thoughts on this would be appreciated. Thanks.

 

If it doesn't happen all the time, pay attention to which circumstances it does happen and maybe you could narrow it down. I would have guessed new tires and grease would help.

 

Loose caliper mount bolts, probably on the left. Not the ones that hang the caliper but the bigger ones that mount the bracket.

 

check the dust cover makes sure it did not get bent