Ok I now really need help with this as I am unable to sleep until I can solve this problem. It is purely a mechanical issue that does not make any sense, simply why do these sprag clutches in the drive gears operate in reverse. I have been thinking if I can lock the gears to the shaft then it will mean when pushing the mower back and forth without the motor running it is going to be turning the gearbox. At this stage I'm not sure how in can lock the gears to the gearbox shaft