Under no secomstances should you drain any fluid from the trans and then attempt to drive it until you refill it. You will fry the trans in seconds. Also, if you do have a drain plug on the converter and you manage to drain the trans make sure you start and fill it in neutral . And make sure you put at least four [5] quarts in BEFORE you try to start it. check your service manual [ you should own one] for the proper amount. since I don't know anything about your rig [no signature] I'm going to guess you don't have a drain plug on the converter. SOOOOOO, take it to a trans shop and have them flush it and change it. I don't want to sound like a messenger of doom here but one wrong move and you'll be spending a couple thou' for a new unit. good luck , and if in doubt, ask, that's what we are all here for.