A-904 TC fill quandry

Not me... fluid *is* actively pumped through the TC by the pump (not the
convertor or turbine) even with the vehicle stopped. If that didn't
happen, all the heat generated by the engine churning fluid against the
locked turbine at a traffic light would never be carried out of the
convertor. Old Mopars (without the kits John mentioned) don't circulate
the fluid in Park, but they do in *every* other gear including neutral,
regardless of whether the car is moving or not. Newer ones like the
41TE/42LE series circulate fluid in Park as well as all other gears.

As for your method of changing fluid, I can't remember right now where
the fluid gets routed after the convertor. If it goes straight to the
cooler (and I'm 80% certain that it does), then you are indeed doing a
reasonably good job of blowing the last of the old fluid out as you add
new fluid. If it goes back to lubrication, then you're not doing nearly
as good a job. I'll see if I can remember to check the manual on fluid
flow path. Or more likely John will post from his encyclopedic
torqueflite memory before I can check...