I would guess 150 lbs without torque converter and fluid depending if it's a 4MATIC (AWD) or just RWD. I've change a few transmissions in BMW 7 series, Audi quattro, and and old R129 500SL. The Audi A4 Quattro was the heaviest but still maybe only 200-250 lbs. I'm not sure what car or SUV would have a 500 lb trans unless it was some heavy duty off road or race application custom

Try this PDF https://akpphelp.ru/images/contents/files/722.9%20Manual.pdf press ctrl+f and search for weight within the file

From what I found it was 82 KG or 180 lbs with converter and fluid

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