I have a late model 40 and a 60 that both need the knuckles done. i have the original manuals and they walk me though the process alright but i just wanted to know if someone could give my and tips on doing this. what stuff will i need to do it and how hard is it. Also i wanted to know, will i just need to replace to knuckle seal or is there more to it. my 40 leaks through the hub so i figured it was just a bad knuckle seal. any tips or help is much appreciated.