08 G35x rear diff part ID

LBC8730

New member
Ok, I'm an idiot.

Replaced rusted rear subframe and I can't for the life of me identify where this part is supposed to be located.

I swear it has to be something with the rear diff but I can't find any diagrams that locate it, definitively.

73mm OD x 13mm ID, Can anyone identify this for me?

Thanks in advance.
 

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