Different PCM design on Jeep Grand Cherokee 4.7L V8

Different PCM (Powertrain Control Module) Design on Jeep Grand Cherokee 4.7L V8

There are two types of PCMs (Powertrain Control Module): JTEC and NGC.
JTEC is the older controller, and NGC is the newer controller.

There is an easy way to tell the two apart: an NGC.

PCM has four connectors on it because it integrates the TMC (Transmission Control Module), while the JTEC has three connectors on it because it uses a separate TCM