i have a 5spd in my truck, and if i jack it up off the ground, start it up and put it in neutral, the back tires will spin like its in gear. but on the ground, you would never even know. thats a tough one. maybe find some loose dirt where you can go power brake it and see if the front tries to spin, or if its just friction traveling through the tranny to the tcase thats making it look like it has power to it. hope i helped a bit.
