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The transmission control module (TCM) for the 2004 Dodge Ram 1500 can be found in an E-Box within the plenum chamber by the firewall on the passenger side of the engine bay. Signs of a malfunctioning TCM include stalling during gear shifts, difficulty changing gears, improper RPM shifting, and being stuck in neutral. Some OBD codes related to a faulty TCM are P0613, P0700, and P0706. While these issues could stem from other causes, conducting diagnostic tests can help identify the specific problem. Replacing the TCM can cost between $150 and $300, depending on whether you choose an aftermarket or OEM part.
The transmission control module for the 2004 Dodge Ram 1500 can be found in the e-box located in the plenum chamber on the driver's side, underneath the engine control module.