The Oberaigner SEV planetary gearbox was designed specifically for vehicle electrification.  It is a perfect solution for installing your Borg Warner, Cascadia, Bosch, UQM, Danfoss, or Brusa motor into a traditional front-engine, rear wheel drive conversion.   The gearbox has a gear reduction of 2.842:1 which pairs excellent with an EV motor that has an RPM range of 10-13000 rpm.  It is rated for motors producing 600nm and 250kw, and spinning up to 13,000rpm.  These gearboxes come with a mechanical park-lock that is very handy in an EV conversion.  Adapter plates/shafts for popular EV motors are available for the SEV gearbox.  Please inquire about your specific needs.