Different PCM design on Jeep Grand Cherokee 4.7L V8

Posted by MIchel Chen on

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


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