This weekend I replaced my rear left half shaft. I didn’t even get a mile down the road when I began to hear a horrendous grind. It sounded and felt very bad and expensive. I guess I was fortunate that I was only right down the road from home. Unfortunately, the new shaft is now completely stuck. With the rear of the vehicle in the air, I can rotate the rear right tire and the rear prop shaft will rotate. however, the rear left tire just spins without any corresponding motion from the prop shaft or other tire. Is it possible that when I installed the new half shaft, that I didn’t fully engage it and that the grinding noise is from the splines of the shaft on the diff end screwing something up? And since it now will not budge, should I be able to remove the other half shaft on the rear and find something long enough to try to hammer it out?