2000+ WRX Automatic Transmission Compatibility

[UberRoo]

Please don't write me nasty letters or burn me at the stake for even considering this, but I'm considering putting a 2000-something WRX automatic transmission behind a 92 SVX engine. See, it needs needs a tranny, and I can get a free transmission for it. If it wasn't free I'd be going the manual route, but free is just such a darn good price.

My question is whether or not there are any special considerations to putting that transmission behind an EG33. It should bolt up, it should handle the power, and the wiring harness should be the same, (or at least have the same wires, even if I have to splice them into the old connector.) Am I missing anything?

Unfortunately, I don't have many details about the WRX transmission other than what I've already mentioned. It was supposed to have come out of a working car in Japan, but it's passed through several hands so the story may be wrong.

If anybody has any red flags to raise, please do; I'm all ears.