WARNING: This page is about a different car, the 2009 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Powertrain Control Module
Courtesy of CHRYSLER LLC
The Transmission Control Module (TCM) is a sub-module within the Powertrain Control Module (PCM) (1)
. The PCM is located on the right inner fender.