how do i get the small end of the pinion bearing out

[aftrmath99]

anyone know how to get the small pinion bearing out or a rear differncial?  the collar is stuck down in the hole and its all thats left of the bearing.is there a special tool or does anyone have a trick to remove this little booger im me at aftrmath99 on yahoo or email me at aftrmath99@yahoo.com if you have any options for me. i dont want to buy a new one because they cost $579  

[TRX450R_Racer]

What are you working on?