Certainly sounds like a B2 failure but odd that there would be a puddle of fluid under it, unless a part of the piston went through the cover or something. Obviously I'm just bench-wrenching here but it could also be one of the hoses failing and then the transmission is starved for fluid and won't go forward (in which case it wouldn't be immediate, but could also ruin the transmission). Might also want to post your location, if there is a willing experienced member nearby perhaps he or she could take a look and give a second opinion. At the end of the day, used transmissions are fairly cheap...certainly worth the expense to keep the car on the road. Labor shouldn't be too bad with it either for a decent mechanic.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth