Will dodge quit using cummins engines?

Dodge (Ram) has already phased out Cummins engines in some of its models. While they used to be a prominent offering in heavy-duty trucks, the current generation of Ram heavy-duty trucks uses Cummins only in specific high-output configurations. For the majority of their heavy-duty lineup, Ram now uses its own in-house developed engines. Therefore, the answer is effectively yes, although it's a gradual process rather than an immediate cessation.