RAM 2500’s 6.4L HEMI Has Cylinder Deactivation… and I DON’T LIKE IT 😅
As a heavy-duty mechanic, I’ve got a real gripe with the 6.4L HEMI in the RAM 2500 — and it starts with the MDS system. Unlike any other HD gas engine, this one has cylinder deactivation tech, and I’m not a fan. Why? Because more complexity usually means more potential failure points. In a heavy-duty truck, I want reliability, not gimmicks. Here’s why I think the 6.4L’s MDS system is a step in the wrong direction.
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