VEHICLE WAS TRAVELLING AT 60MPH WHEN ENGINE RPMS REVVED EXCESSIVELY HIGH YET VEHICLE LOST POWER TO THE WHEELS. WITH NO ACCELERATION YET ENGINE RED LINED, ATTEMPTED TO MAINTAIN CONTROL WHILE BRAKING AND PULLING TO THE SIDE OF THE ROAD. UNABLE TO MAINTAIN FULL CONTROL. VEHICLE ENTERED NON TRAVELLED PORTION OF THE ROAD (DITCH). ISSUE WAS LATER DETERMINED TO BE THE REVERSE WAVE PLATE (AKA - DRIVE/REVERSE CLUTCH) REQUIRING COMPLETE TRANSMISSION REBUILD. *JS