Possible tranny damage?

I wouldnt worry. I once broke a tailhousing racing a 3.8L turbo buick on the highway. I only noticed the mist in the mirror after a little while. Then I pulled off the highway to see what the leak was (engine running), then back on the highway and straight home. The whole time it was hemoraging fluid and it still shifted. You can lose quite a bite before it really starts to damage anything.