One thing about the pumps that fit the gear lube bottles: I bought one years ago from Checker, and it leaked. Pain in the butt. Then I read in a few different places that the Checker ones leaked, and that the Napa ones didn't. Sure enough, I bought the Napa pump and it doesn't leak. So beware.
I think the Checker one is the same one sold at places like A-Z, and maybe the Napa one is the same thing you'll get at Carquest? I'd just go to Napa to be sure. Same price, just a better part.
- Glenn