I got about a gallon of fluid from the "outlet"/front tube at the radiator using a hand held "MityVac". Wanted to back flush cooler in radiator but couldn't because brass ELL {left side} on radiator was completely plugged. Cleared it with drill bit and back flushed with the vac - lots of stuff.
Replaced filter and pan and fluid. Car went five miles before it gave out - lots of noise except in Park and no movement. Towed for third time.
In my view, the only positive aspect is that it seems that the trans works until it gets plugged up again. The question is whether repeating this procedure it will clean itself out, or, is the trans shot. If the latter, the car is shot.