Not to hijack this informative thread, but I was wondering if you still have the stock DMF and clutch in your truck? If not, what do you have and do you tow heavy. I just got my '16 3500 G56 2 months ago and will be towing 18K or so with it in the future. Thanks.
Also, what are you using for transmission lube?
My 2013 is only rated to tow 16,300 lbs. But your 2016 might be rated higher.