I know trachtec (of detroit locker fame) makes an auto locker for the H233B, but I don't know if they make an auto locker for the front axle. As a heads up if they do happen to make an auto locker for the front axle and if you put one in MAKE SURE to do a manual hub conversion. You have to be able to be ABSOLUTELY sure that your front axle still isn't hooked up when you try normal driving. It's also nice that you can have a "2 lo" position if you need to do some tight maneuvering off road. It also makes it handy when you can unhook one axle so you can drive in 4hi on normal roads (insert snow, rain, whatever) and not experience steering or front axle bind (inheirant to an auto locker). The bind can be enough that it will absolutly destroy a conventional U-joint and the attached axles, so imagine what it'd do to a CV.

Justin