how do i pull the input shaft bearing when it disintegrated so a bearing puller cant get a hold of it?

this is whats left

 

Freeze the entire casing to try and get the metals to shrink a bit, and get some hammers, screw drivers, pry bars, and blocks of wood out. I have yet to have a bearing puller work on that. ISBs that fall apart like that are my nightmare. lol

You can get a dremel/cut-off wheel out, too. Just avoid damaging the casing.

 

Heat the case around the bearing with a propane torch and use a slide hammer puller.