ok i thought my 203 was bad and was making a grinding noise so i replaces in with another 203. Anyways the 203 i got from the jusnk yard has 2 levers on it. 1 i belive to so the high, netual, and low. and the other to do the 2 and 4 wheel drive. But when i put the case to the rear lever in straight up and down(2 wheel) with the truck in high or low the truck doesnt move and the tcase make a wining noise. But when the rear lever towards the case is in 4 wheel and the other lever in high or low the truck works fine. Is this what is ment by a full-time case does the front drive shaft always spin(right now mines not hooked up). My orginal 203 had the 2 wheel work and the font output didnt turn (did i have a part time kit in it from orginal owner). please help im all confused and really hope i dont have to take this heavy case out again and have to put another one back in. oh yea and its not my shifter links im shifting it by hand under the truck.