Yes I bought one from Sears. But I don't trust it. Metal heats up slower than the fluid inside, and it cools down slower also... Another thing, the pan shows a good 8 degrees more on the engine side of the pan as it does on the further side.

I had to take a guess... After a nice 25 minute drive I was probably looking around 80c, since 80c is generally as hot as a tranny will get, besides spirited driving getting it up with 88c-ish, so I just checked after a good long drive.

I'm going to order a OBDII tool for it, but the current options don't support tranny temps. scangauge is getting close, but they don't yet support chrysler/mercedes trannies.