Mine did this when I first bought it. with 70K on the clock I proceeded to diagnose that the ATF was SPENT, it wasn't burnt, just dark fluid with no smell. So, I would dump the contents of the pan and replace with 4 qts about every 3 weeks. Yes, I know it is only suppose to be 2 or 2.5 qts but mine does 4. After the 6th drain and refill the ATF began to drain out with the smell of ATF, it is still somewhat dark and will require about 4 more dumps before I get to the point where I dump it at every oil change. Also, the very minute leak has gone away as the seals are swelling back to normal size. I am on my 3rd case of Mobil generic DIII fluid from COSTCO and will probably keep using the stuff. The Spool Up problem is gone now.