Okay so I have a 1985 bronco ii that I recently got. I was told it would not crank when you turned the key on but that is not the case. When you crank it the starter motor turns over just fine but in the front the crankshaft does not turn. The engine is not seized. So i took the starter out to see if the flywheel teeth were stripped and they were fine. I noticed that I can just spin the flywheel by hand. Any ideas as to what is wrong? Thanks in advance.