So far this morning I replaced the front axle lock actuator and front diff fluid. First drive and was still getting service 4wd light trying to engage 4wd and it would never make the switch took actuator back off and verified the forks were in the collar. They appeared to be out it back in with bolts hand right and tried again, just sitting in driveway. It made the shift to 4wd without issue. Torqued bolts down, topped off the fluid again. Sitting in driveway again, out truck in driveway and triwd to engage 4wd. Light just flashed and never made the changed. Pulled out of driveway and tried again while moving and it shifted fine. Guess there was just enough tension sitting still, with it in drive, to not make the shift. But it appears to be working properly now. Will see if I keep getting service 4wd light over the next few days if driving. On the factory actuator, it must have gotten hit at some point when off roading. This spot on the actuator is loose and a few months ago I actually had to use my channel locks to squeeze it back together as there was 1/8" gap where it looked like one of rhe rivits had started to pop out. 
