Sound goes away when pulling e-brake!

[Viking_quest]

I currently have a metal rattle that happens in between accelerating and when I pop the clutch it goes away. If I pull my ebrake up while I am accelerating it goes away completely. I had my muffler checked out and it isn't the problem. I don't know enough about that system to make a diagnoses. Anyone chime in and maybe let me know what is happening I would be much appreciated.

 

[Aurilious]

Check the bolts that connect the rear diff to the diff hanger.

I had the bolts come loose and shear off on my stock MS6 at ~40k miles. Replaced the bolts with higher grade and reinstalled with 242 loctite. This type of bolted joint should have thread locker (aluminum threads with a steel hanger = different thermal expansion rates that can lead to loss of bolt torque from thermal cycling and shock loading).

My car had similar/same symptoms as you describe. Pulling the e-brake to disengage the rear diff would eliminate the driveline clunk.