Wont rewind with heavy tape reel. Took top off, while in rewind mode, motor spins,in turn spins aprox 2 inch diameter rubber wheel which in turn spins knurled wheel on bottom of reel drive. All turning fine. Part that holds the tape doesnt turn. Seems there is some kind of friction clutch that maybe is too loose. Any ideas? The take up braking force also seems a little too tight making it pull hard.

