[Gaz64]

The gearshift selector finger only needs to have the corners chamfered off. Then it can't pick up two shift rails at the same time.
The end should be a circle with two flats.
That comment from Tremec about jamming into 3rd as the cause for gear failure is garbage. Clearly the reduced torque capacity from less than designed gear tooth contact width and the applied torque, is the cause.
Gary