I was traveling down Elm Street and had just gone through the railroad under-pass when I pushed on the accelerator and heard something like the grinding, spinning, sound under the front passenger side of the vehicle. Additionally I noticed that I had lost all propulsion. I moved out of traffic and glided to a stop on a slight hill. This is when I found out that some how the whole drive train was disconnected, because I placed the gear selector into Park and let my foot off the brake and began to roll backwards down the hill. I quickly reapplied the emergency brake, and turned on my hazards.i turned the Jeep off hoping that it would re-set, and the transmission would re-engage. After waving a few cars passed, I restarted the vehicle, and the power train did re-engaged and I was able to disengage the emergency brake and remove my foot from the brake pedal. The vehicle was flat bed towed to a mechanic. He informed me of that this year and make of Jeep had a transmission recall but the VIN on my vehicle but was not included on that recall. He verbalized I needed to report this because my Jeep is doing the exact same thing as those involved in the recall. He verbalized that a clip was not postioned correctly and that is causing the transmission to completely disengage internally. He suggested I report this as Jeep may have overlooked the Trailhawk models in that recall.