I thought about doing mine like this. Was going to buy 5-7 quarts of fluid and the filter. I ended up deciding to let my local Ford dealer doing it. They dropped the pan and changed the screen filter then did a low pressure 'flush' until clean fluid ran out of the torque converter. All this for $200 (3 years ago) and I didn't have to get dirtyAnyone know how many quarts of Trans fluid when you just drop the pan? No flushing, just dropping the Trans pan.