Thank you guys for all of the replies!
Sorry it’s hard for me to get time to actually get under the car and look since it’s my daily driver.

On my my next day off I might try and check the diff fluid to check for any large amount of metallic particals. (Might as well change the fluid anyway)

or or I could try and take the back plate off the diff and move the car in and out of gear to see if anything is moving that should not be...

i have the PDF for the crossfire manual on my home computer. Not sure how hard it is to take off that plate it seems pretty wedged in between the rear frame support area.

Or or if I can try woodys idea earlier that involved jacking up one side and locking the driveshaft in place (unsure how I’d go about that) and moving the rear tires to see how much play they have.

I understand how differentials function. But even at auto shops you’re only suppose to work on them if your an A level technician with lots of experience; they are finicky and have very tight tolerances!!

otherwise, anyone with any test procedures I could try I’d be willing to try anything.

thank you!!

-Darren