Front end vibrations

I am having an issue with my front end of my truck. It feels like the transfer case is trying to engage and spin the CV'S inside of my lockouts. Mainly happens while I'm barely turning right going 55-60. I've never had an issue with this be for but I have the thought that either the lockouts have gone bad and aren't free spinning like it should in 2wd. Also if I lock the hubs and put in 4wd it will not make the grinding/vibration anymore that it normally makes.

pull off the hubs, clean and regrease them - the grease in them has stiffened up to the point that they are not sliding in and out properly.

Just pulled it apart. It had avm locking hubs on it. Had them for about a year and a half. The inside of the right one was shot (which is the one that was giving me problems). I'm now looking for a better brand if possible