OK the confusion seems to be in the wording. The 2015 diesel supplement says this at 60K, 120K etc:
Change automatic transmission
fluid and filter(s) if using your vehicle
for any of the following: police,
fleet, or frequent trailer towing
(68RFE transmission only).
At 120K:
Change automatic transmission
fluid and filter(s).
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The later manual (looked at a 2017) clarified this at 60K, 120K etc:
Change the automatic transmission fluid and sump filter (AS69RC transmission only).
And at 120K:
Change automatic transmission
fluid and filter(s).
Then another line says for 60K, 120K etc:
Change automatic transmission fluid and filter(s) if using your vehicle for any of the following: police, fleet, or frequent trailer towing (68RFE transmission only).
So the Aisin filter and fluild should be changed at 60K, 120K etc, and fluid only at 30K, 90K, 150K etc.
https://carmanuals2.com/get/ram-2500-2017-diesel-supplement-97413
SnoKing