I have just bought a 1992 Fourtrak 2.8TDX with the automatic locking hubs and the button on the dash to give you 4H. Is there any particular technique for operating the 4 wheel drive as it would seem that even though the 4WD lights are on my back wheels are spinning and I am going nowhere in the mud when towing. Again I got my back wheels stuck on ice and the fronts did not pull me out. Is it me???