Taking apart hubs 87 K20?

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I've worked on several 4wd front axles like this before, but on these late model manual locking hubs, the 4-lug lock nuts behind the first gear pack should be insanely tight, correct? I believe I've heard problems about them actually backing off. I know these hubs have been redone before, just wonder if the previous guy didn't tighten the hell out of them. Couldn't get them broken loose with a 1/2'' ratchet. May try a long punch and hammer tonight. Just making sure I'm not missing anything here.