I can't express how grateful I am for the staff at North Texas Transmission. Another shop gave me a rebuild quote, with a *maybe* TCM replacement. NTX Transmission gave me a second opinion, and said that before doing anything else, I need a TCM, because it's failed completely. They couldn't get one, and so they told me I could come install my own and they'd recheck it for me. They didn't even charge me a diagnostics fee. Got the TCM installed right there in the parking lot, and it ran like a charm. $700 part and my time, instead of $4-5k of rebuild/replace work. If anyone ever asks me where to go for Transmission work, this is where I'm sending them.