The AR70 tranny in my Crown Vic is doing the same thing. 3 tranny shops told me the same thing- Needs total rebuild, changin fluid makes it worse. However I've heard other owners say they just drained or changed the torque converter. Found out that most repair places don't drain the torque converter (where two thirds of the fluid is) during a tranny service. I've had 'em try to sell me a rebuild when all it needed was a $15 modulater valve (C6) on the outside of the case!I bet if ya went to a tranny shop to ask directions they'd tell ya you need to rebuild the tranny. On the electric shift trannys there are sensors that go bad, springs in the valve body that break and servos that could need replacing but you have to remove the cat converter to get to it. I'm not a tranny expert but I'm researching all I can before I go to another tranny shop! Good luck to ya.