The TCM is located under the hood passenger side up towards the fire wall under the plastic box. It is the circuit board next to the relays. The board has two connectors, the connector towards the center of the car is the one that wicks the trans fluid, however you will need to remove both connectors to remove the TCM board.

wbrian63,
You are correct that you need to stop the leak. I mentioned in my post that I had my trans seal replaced last year but the dealer didn't know to check the TCM for trans fluid.

mpolli,
Most electronic circuit boards are not designed to operate with any type of liquid on them. With the trans fluid inside the connector to the TCM could have acted like an insulator. If there was any graphite in the trans fluid then any it could have acted like a short between the contacts on the circuit board. Best to keep electronics clean and dry.

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Ray
1998 Mercedes E320, 200K Miles
2001 Acura 3.2TL, 178K Miles
1992 Chevy Astro, 205K Miles