stick it in 4wd & jack a back wheel up,get some1 to drive it slowly with the front hubs set to 4wd n see if a shaft is turning,i bet that the FWH asr stuck inside,fixed a vit on the hill at drumclog that did the same thing,took it off,cleaned the crap out of it,dunted it so the solector dog moved into the 4wd position,packed it full of grease & refitted it,was on our way in 20 min