I have a 2012 Coupe out of warranty and ordered mine and received it in 7 weeks. The dealer told me they were no longer available so I just kept driving my car and figured I’d deal with it when it breaks. After reading all I could in this forum I went back to the dealer and told Dennis “please try harder” and sure enough he called me a few days after we ordered and said “you’re right, I think we’ll get one”. Then about 4 weeks in he called and read this to me “ There is raw stock in a processing center for part #20931063. There is no anticipated ship date to a shipping facility. Will provide more info when available” and that meant I was getting it sooner than later. 3 weeks later it arrived. Yes I have pictures but I don’t think I’m aloud to post pictures yet. BTW no core charge either so I got to keep my old one.
So this story gets even more interesting. You know how people have tried different oils and different viscosity’s? Well I decided I’ll try redline since that’s all I use on my 93 RX-7. I bought 75w-140 and sure enough no difference but because you could grab my axles and move them pretty easily I had a horrible oil leak. Well then I decided when it was time to top off my oil I’d try Redline’s “Friction Modifier” it comes in a 4 oz bottle, and 3 or 4 days later I realized the humming/noise was 95% gone. I even had my Service Manager/Close friend hop in the car that morning and he was amazed that an additive could make such a difference.
I’ve had the diff in for about a week and everything is sounding great and no leaks. I did dump the oil that was in it when I installed it and used the Redline 75w-140 with 1 bottle of friction modifier/break in additive. The dealer I bought from is MEDINA A͏U͏TO MALL in Medina, OH and Dennis in Cadillac parts was my savior. Tell him Ernie sent ya. Oh and once I can post pics I will and I’ll update you on what I find inside the old diff. Good luck everyone!!!