I think it is jealous! No check engine light at all, and this happened pretty much overnight. Also noticed that he's NEVER had overdrive (first time I've driven the truck)....and this afternoon 4WD is showing not to engage fully, but it drives like 4low is locked in when you try. How odd.

 

Must be that newfangled E-lec-tronic 4wd. I hated that. Flippin' three hundred dollar parts everywhere in the system, that are highly prone to failure. Give me the low-tec stick on the damn floor.