[cguidry]

what does it mean to stake a lock nut like on the rear end on the pinion gear

 

[Helmut]

what does it mean to stake a lock nut like on the rear end on the pinion gear

It means to take a punch and hammer and bend part of the nut down. There's usually a groove or flat place to stake it down into, so the lock nut won't loosen up and turn back off.