Re: how to drain a torque converter w/o drain plug
The DIY method is:
1.Drain you tranny pan (hopefully you have a drain plug, otherwise drop the pan and the whole nine yards that goes with that - might as well change your filter and gasket then).
2. Re-install pan (or drain plug), fill tranny to correct level of fluid without starting your vehicle.
3. Disconnect your tranny out line (usually the uppermost tranny line that goes to the rad). I disconnect it right at the radiator.
4. Attach a 5/16 inside diameter clear hose (about 6ft or so long) to the line you disconnected from the rad.
5. Run free end of the hose to a jug to catch any outgoing ATF.
6. Start your vehicle, put tranny in gear. You will start to see trany fluid flow through the clear hose into the jug now. Let a few quarts go in. Stop engine. Top up your trans.
7. Start engine, put tranny in gear, watch fluid in hose come out. When fluid comes out bright red, you are now pumped out most of your old fluid out of the torque convertor. Shut off and refill trans to correct fluid level.
This is the backyard tranny flush method and should get most of the old ATF out of your trans. I've done it several times, no problems. I usually pick up a 30 big pail of trans fluid at Walmart for $35 CN. Valvoline currently makes the Walmart Tech2000 auto fluids.
Hope this helps.