The click is normal for engaging/disengaging 4WD , the locker makes it own click going in/out. Many 4wds don't work well or at all simply because they've not been used much, this one sounds like it was at least routinely. Mine took months before it actuated/disactuated on command.
I'd go for a 2nd drive and be ready to buy! Luck. :cowboy:
Thanks for the info.. I’m debating on purchasing it now for 2 reasons the brake pedal is soft and slowly goes down but the main reason is he raised the price to $5k and I’m not going to pay price games with this guy. Thanks for the info though you’ve been a big help