Anyone?
Oh, also forgot to ask about the second part of my OP...changing back to 2wd from 4hi. It didn't seem to want to go back. I'd tried everything, stop, rolling slowing (<5mph), and it didn't seem to want to change back to 2wd until I was making a uturn. What's up with that?
I already answered that for you, "Not a coincidence on the turn. I too learned if you engage/disengage just before a right turn, it would immediately engage/disengage. After a few months of weekly 10 mile use, it now engages/disengages at will going straight or whatever direction."
Yes - the owner's manual says to use it at least one a week for 10 miles. It may take several weeks/months but it will smooth out and engage/disengage in time, just keep the right hand turn idea in mind each time. Then in a few weeks try it straight ahead - engage it a couple hundred yards before the next right turn. I try to engage/disengage at relatively low speed (like a normal person would before a turn). Mine went thru a fluid change yet that made no difference, only regular use.
I forgot do you have an Base/SR5 or Limited? See the chart below why it matters. Luck buddy!