I believe 1998 to 2014 is what I am seeing for the years it is compatible. I used this in a 2014 1500 Hemi mainly while towing my boat or snowmobile...19ft fiberglass deep v tandem trailer and 16x8 enclosed. It definitely shifted and ran better in the tow setting while towing. 5th gen (2019+) Rams need the Pulsar which I am using in my 2022 RAM 1500. Would use economy setting on occasion but usually kept it in stock if not towing.