I was very involved with the SC bearing failures from the get go. Sadly you are not going to get any definitive answers from any creditable sources on, well anything. Your best answers are going to come from peeps that have been willing to to some digging both hands on, and in my case behind the scenes research.
So what, where this all started for me personally was at just over 2k miles on my 2015, the dreaded SC bearing noise reared it's head. Shortly after my SC was replace by SRT.
Well I had a lot of questions. So my journey began. The short of it was many peeps I had contact with at time with both 2015 and 2016 Hellcats had the same SC problems I had. I'd say roughly 70+%. So when you hear some Mopar bootlicker tell you it was a small pool of peeps with the issue, I'm here to call BullSh@t. And that it with a capital B.
In some cases people I was in contact with had 2 replacements and sometimes even 3!
So I started with SRT and worked my way up the chain as far as I could get, and of course no one of credible stature would give me anything definitive on the record. It was mostly the off the record Corp nonsense responses. Every now and then I'd get an off the record SRT tech peep who would admit that an inferior bearing was being used. ie tolerances not up to spec on what the top RPM of the IHI SC was capable of achieving. (Stock)
So I ended my charge on that front and focused more on real life people. You know, the you and I type scenario. I reached out to as many peeps as possible at the time and found the most common denominator was the last 2 digits on the SC part# was going to be a very good indicator of you likelihood for failure. Not the year of the car or when it was produced. In my case my SC part# ended in AA.
Seems there were a vast amount of IHI SC part #'s in a very short amount of time. "AA-AF". Why, Who, What...I dunno, but that all seemed to come to a screeching halt with part# ending AG. Peeps with an IHI SC part# ending in AG seemed to have the holy grail of SC's and no more failures. If memory serves me correctly I think I only knew of 3 AG SC failures before I stopped my quest in all this SC nonsense.
Before some ignorant forum troll chimes in, I'd like to clarify that "failure" in the sense of bearings, means any kind of grinding, scratching, or other noise/noises coming from from the Bearing/Housing. I'm not talking about some idiot who takes a failed bearing to the point of catastrophic SC failure...ie scatter/fragging, etc of the SC. Any fool who knows anything about bearings knows, any bearing making noise is a "Failed" bearing.
So with all that out of the way, my advise is look at your SC# part number. It should be located at the rear of the SC by the firewall. (Image below)
If you have anything ending AA-AF I'd be concerned. Also please note that I ended my research into all of this mid 2017. So a lot has probably changed since then. Also the only STAR Case info that was available at this time seems to have vanished. Here is how that use to read at the time. (Image)
So in closing, if you are hearing something out of the norm...chances are your ears are not deceiving you. If you have a 2015-2017 with an IHI SC part number ending in AA-AF I'd be even more concerned. What you choose to do with this info in entirely up to you however. Good luck!