Might be the front seal. Where is it leaking , the bell housing or the lines or what? As far as trans fluid getting on the exhaust it wont hurt anything it'll just smoke alittle and stink like hell. My old tranny was leaking from the bellhousing and I thought it was the front seal , but i got a big suprise. Believe it or not but the input shaft in the tranny had snapped in half! The most amazing part was that after it started leaking alittle and giving problems accelerating and stuff , i still drove it almost 6 months before I got it checked out and they showed me the broken input shaft. It had broken at an angle and was basically spinning around inside and getting just enough contact with the other broken end to make the car still move haha. Other than the leaking and weak acceleration I didn't think anything serious was wrong . The guy said he had never seen it happen before. Anyway sorry for the story , I severly doubt thats whats wrong with yours hehehe. i'de say it is a gasket like jeep is saying or the front seal maybe. i've even had a tranny leak out of the dipstick tube hole before.