I just rebuilt my 446 PTO with-in the last few weeks, make sure the spring washers have some spring in them. The old ones I took out were all flat, I ordered all new washers and spacer's from Brian and in less than 1 hour it was like brand new. If you follow the parts diagram for proper placement you should be fine.
P.S. don't tighten anything to tight until it's all together.
P.S. don't tighten anything to tight until it's all together.