Toyota ATF IV and dexron II are OK. I made the mistake of using dexron III some years ago and ended up with a loud buzzing noise coming from the tyranny, (dexron III is a GM fluid and not meant for the A340 boxes) I quickly drained it out and filled up with dexron II. You probably already know this; when you undo the train plug you will only be able to drain out about 2-3 litres, most of the fluid is held in the torque converter. Toyota ATF IV is the best, but expensive in the UK.
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