I have the dynatrac front hubs and a few days ago my "serv 4x4" light came on and I cannot get the truck into four wheel drive. I am often using 4 Hi and 4LO for work in the outback. I suspect it might be a bad sensor or plug gunked up with dirt but if it is something more serious and I need a new transfer case I am wondering if anyone has changed there NP 273 electronic shift with the NP271 manual shift transfer case? I'd love to ditch the electronic gremlins, especially since I am often in the middle of no where working. Thank you.