I bought mine with 75K. I have only drained and refilled the trans about 8 times now trying to get it clean. I did not take the pan off as I did this with my Tundra with 80K on It goes in a nice cherry red and come out a nice dark red.
My temp gage is right set on top of the middle mark, it never moves. Im in SC and we have 105 deg days it never moves.
Make sure you put the Toyota type IV fluid in your trans.
BP