There is actually a drain pug on the back of the front diff too. As AnalogVX mentions the rear is pretty easy to spot. The TOD is very easy to do as well. I bailed on my original attempt with the new tranny as I also have to do Kathy's '01 Trooper which has the same drain/fill set-up. I suspect there is a dealer piece of equipment to change the tranny fluid. There's another pan forward of the main pan (under converter I think) which will need to dropped that holds a bit more than a quart then you've got whatever's in the cooler. Sorry I don't know more as I'm waiting on gaskets etc. before finishing up.