What i did was disconnect the line from the tranny to the radiator and plugged a clear hose over the line to a 5 gallon bucket. I started the truck and poured bottle after bottle of Mercon 5 until the fluid was coming out clean. It took about 18 or so quarts but I wasn't paying attention so I kept on flushing past the 18 quarts. Once I finished, I dropped the pan and changed the filter & EPC solenoid and then re-filled the tranny with 3-4 quarts after turning on the truck.. I ran thru all the gears and it was fine.. Then of course after driving a bit the symptoms started again so I checked the fluid and it was low. According to glacier in my other thread, that is common after a flush. I'm just gonna keep an eye on the fluids for a week or so on a daily basis.