is having transmission shifting problems. We think it may be caused by a bad PCM. I got a good PCM out of another 2001 Durango with the 5.9-liter. We replaced it, but the engine ran for only a couple ...

The powertrain control module (PCM) in your Jeep Wrangler – often referred to as your engine’s “computer” – acts as the brain of your vehicle’s engine. More specifically, the PCM in your Jeep is ...