The drive shaft and the hub extension threads are stripped. I removed the assembly from the trailer. I ordered a new drive shaft and hub extension. (ouch $$). My question is, how do I remove the drive shaft from the crank assembly. The crank assembly has the sprockets, bearing, pressure plate and chain etc. Is it pressed in? I was wondering if I have to drill out the rivets on the housing in order to take it apart. Or is the drive shaft pressed in and out? Hoping to have it ready to assemble when the new parts get here.