That's how I've been doing it (no drill pump, didn't work) for the 4L30E on VX's and Troopers, but with a pressure system I can more precisely and quickly evacuate the transmission while providing a true flush, rather than a drain-n-fill. I've done about 6 of these now, and believe me I think there's a better way that's within the capability and wallet of the average owner.

Eh, sometimes I think I like to "help" too much! LOL! :bgwg: