Sooo.. it's about as much Beemer as my beer can.
All kidding aside, those old 2-speed trannys are kinda perfect for EV's. Tall first ratio sucked for ICE's but is just like starting out in 2nd with an electric which most people do. Only issue is top speed (no overdrive) and lack of a lock-up torque converter.
Even a 'built' slushbox is probably a lot nicer on the rear diff than straight gears.