I saw an old Volvo post that said you could be sure of draining all the fluid from an automatic transmission (assume that means torque converter also) by:
- disconnect A/T cooling line at the radiator - attach hose to run into a container - start engine in neutral - catch old fluid in container - at the same time, continuously add new fluid through dipstick tube until it "runs clear" (has new color?) . May take up to 10 quarts.
Does this have any danger of damaging the tranny? Will it totally replace fluid in gearbox and converter?

The whole procedure is in the FAQs
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88 765 w/2stage boost (TO.)

I always use this method. However, I find it impossible to add fluid as fast as it is pumped out. I use a clear plastic hose and let it run until the line displays a lot of air bubbles in the hose. I shut it off and add what I figure will bring it up to what would probably be full and start it again repeating the process.

Randy

Do it.
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Jim McDonald