Can you swap the ecm from a 98 Grand Cherokee to a 96 Grand Cherokee that have the same motors?

Swapping the ECM (Engine Control Module) from a 1998 Grand Cherokee to a 1996 Grand Cherokee is generally not recommended, even if both vehicles have the same engine. The ECMs may have different programming, connectors, or communication protocols due to changes in the vehicle's electronics and systems over the years. It's best to use an ECM that is specifically designed for the year and model of the vehicle to ensure compatibility and proper function.