Does Torque on drain out 941 when changing oil in transmission?

We are draining the transmission & bevel gear compartment oils on our old 941 (80H2988) loader & replacing all filters, oils, & cleaning the screens etc. & I wanted to ask if there is a way to drain the torque converter completely as well while we are at it, or does it pretty well drain out into the transmission when we drop the oil in that compartment? By the looks of things, it has been a while since it was done, as the filters & screen were pretty well plugged up. The screen under the seat was all bulged out from being plugged........we have only owned the machine since last Oct.

We blocked her up a bit, to better gain access to the "tight quarters" under the machine.

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