the pump of the trans is right behind the torque convertor - which will require removal of the transmission from the car, in a 722.4 there is something near the front of the transmission that does hang up and cause reverse to go bonkers other than the B3 piston. I read about it on a manual somewhere.
Will have to look it up.
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2012 BMW X5 (Beef + Granite suspension model)
1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)
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