I think you can get just the carrier cap, if I'm not mistaken. How do the gears look? Any weird heat related color? I assume you probably know there is a process to getting those gears installed right where they don't whine on you. I think Advance Driveline has it online. Of course new gears are new gears, and it would be an opportunity to change things. Only if you wanted to of course. 4.10, 4.56. That's crazy talk. Nevermind.