Went to change my passenger side CV axle, once I got everything broke down found a piece of the old CV axle was broke off in the front chuck. Broke down the driver side hoping I could knock the piece through with a rod. Can't. So we decided to take the front chuck apart. So we get every screw out of it and it won't come all the way apart. You can get it to seperate about 1/2 a inch but won't come apart all the way so that we can get the piece out. Any ideas.