Cannot locate the transmission control module?

2008 DODGE CHARGER
157,000 MILES • 3.5L • V6 • 2WD • AUTOMATIC
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JORDANLUVSJESSICA
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I have 2008 dodge charger sxt with the 3.5L V6 High output intake. My issue is that I've taken the entire dash apart on the driver and passenger side, and I cannot locate the TCM! I found one plug on the drivers side, but the other plug isn't present and I cannot figure out where it would even be installed. I bought a used TCM whenever I purchased the car initially. But when I went to replace the old one, there was no TCM in the dash to remove! I found one plug for it under the dash it has only 2 wires to connect on it. However, on the other plug with approximately 13 wires to connect, I just can't find it at all. I have another plug for it I just don't know where to wire it in at because I cant find where the old plugs wires are at to even splice into. Please help me resolve this issue, I've had this car for 2 years now and I've only drove it about 5 times! I've also replaced the shift pack for the valve body and also the shifter, and the transmission shift cable!
Mar 14, 2026 at 6:55 PM
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STEVE W.
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What does it do to make you think the TCM is the problem? The TCM is on the left end of the dash mounted to the inside of the A-pillar area. Tucked up under the dash in the corner behind other wiring. The plug with 2 wires in positions 29 (Pink/black) and 30 (Black/tan) is probably C1. C2 has 14 wires in it. If C1 is unplugged the transmission won't operate properly. If both are unplugged the transmission might move the vehicle but not very well.
Mar 14, 2026 at 9:53 PM
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JORDANLUVSJESSICA
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I have looked exactly where the diagram shows and there is not a TCM anywhere to be found in that Charger! Like I said previously, I cannot locate C2 (14 pin plug) on the wire harness but C1 is front and center under the dash. I know it's the TCM because I have a OBDII code reader and it was coding for no communication with TCM from the transmission and vice versa.
Mar 16, 2026 at 11:45 AM
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STEVE W.
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OK, then someone removed the TCM, they likely tucked the cable out of the way as well. Not sure why they would do that as it's a good way to burn out the transmission. Car didn't have an engine swap or transmission swap to something else correct? I doubt this but look under the hood and see if maybe they relocated it?
Mar 16, 2026 at 6:40 PM