Since mine is a 2014 Aisin and it’s been revealed there was a transmission software/hardware change for 2019, my results are no longer relative.

Just wanted to let you know as promised I did check mine while cold and hot today and did not see what you are experiencing.

Looks like you have some good input and I am leaning towards the theory of possible de-fueling issue that may be intentional or perhaps not.

Hopefully someone with a 2019 Aisin will confirm.

Another option is maybe you could get the dealership to let you take a 2019 or 2020 Aisin for a short test drive.

Please keep us posted.


2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

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