After you drain the torque convertor do you just fill up the tranny and let the pump fill up the convertor?
OR would this be bad?

If it is bad then how would you ever get fluid back up into the torque convertor?

How are you draining the torque converter? Is this a new converter and its the first time you are starting the vehicle? If so you just dump in a few quarts and light the vehicle off, let if run for a few seconds and then pour in some more. Then you can let it run for a while to warm up. Check the fluid level and shift through the gears as it warms up. Finally go for a test drive and top off fluid if necessary.

This is just a complete fluid change (and filter) on the original tranny that is still in the truck ('97 F350). The E4OD on powerstrokes has a drain plug in the torque converter specifically for complete fluid changes.

I just called the dealership and talked to a mechanic there; he said that after draining the torque converter I don't need to manually fill it back up. This is what I was worred about...figuring out a way to manually fill up a torque converter while in the vehicle. He said to just bolt everything back up (pan and plug) and add about 8 quarts to the tranny, start it up, and add more...

Yup, the mechanic you spoke to is right. There is no way to fill the converter while it is in the truck except just start it up. After the initial start up, jump in the truck and move the shifter slowly through the gears all the way to 1st. Then put it back in park and fill it to the middle of the hashmarks on the dipstick. be very careful not to overfill the tranny. this can cause foaming and cavitation while driving that can harm the tranny.

Thanks for the tips:)
A standard auto fluid and filter change can be done blindfolded, however, when you throw in the ability to drain a torque converter a few other questions pop up...thankfully they got answered.