When installing a new angle drive, I pulled out the pinch bolt in the tail housing. it was helicoiled or timecerted (i dunno the difference) that came out with the bolt, bolt is pretty ate up and I need to repair the the threads with another helicoil or timecert. what do I get and how do I do it??

HeliCoil

The above link will explain HeliCoils and the installation a little better than I can.

What you need to find out is what size the bolt is and what size (OD) of the threaded insert.

Depending on the application, sometimes an oversized insert is available.