My 4 wheel drive seems to be working intermittently. I keep switching between 4w and 4 wheel low, also switching between forward and reverse to get in and out of 4 wheel drives. I have not been able to tell what I need to do to have it work on a consistent basis, any ideas?

 

Electric or manual switching of transfer case?

 

Electric and they are manually locked in, but as I understand it the switch overrides that.