Metal grinding noise when letting off gas

[James_40thAnni]

Hey guys I have a 04 V6 just got the car back after awhile and noticed there is a significant grinding noise when I let off the gas near the front of the car it sounds like help needed first mustang owner

 

[Noobz347]

What does, "Got the car back after a while" mean?

Was is out for maintenance? If so, what maintenance?

 

[James_40thAnni]

It was out for A/C repair and my brake line was hitting my driveshaft