I'm trying to get the PTO reassembled on my BN after replacing some seals/gaskets. But I swear, I wore myself out trying to get this chore done. After I get the larger part of the unit fixed on the transmission I cannot get the smaller section to fit into the larger one so I can bolt it all to the transmission. I get to about a inch but no further. The shaft that engages the PTO is in the disengaged mode but the section will not push in. What am I missing? I have tried both putting the units on together and separately. I would post some pictures but I was too dern exhausted to push the button on my phone.