Update : For anybody else having this problem, you have to change out the logic board from your old drive to the new one. Pain in the neck, but works!
I've done with twice with two different drives ordered on Ebay, and keep getting the same error code (160-1402). Is the place I'm buying from selling bad drives, or is there something else that needs to be done after? It goes back to working when I put my old one back in, so I know I'm physically doing it correctly.