So it sounds like I may want to wait and see if it it gets any worse. I drove it today and yesterday and no slipping. Of course I avoided a lot of torque, especially in 4th gear, which is not difficult.

How long does a typical clutch last anyway on one of these trucks? I don't drive off road or peel out. I basically drive like an old man, so I would expect my clutch to be toward the upper end of life expectancy.

Not sure where the oil is leaking from, I always assumed it was from either the drain plug or the oil filter, but when I have the tranny off I will look around for other possible places. Thanks for all the useful info, it's more informative than polishing off a 12 pack with an experienced Toyota mechanic. Cheaper and less filling too.