It isn't very clear on the picture, but there is a larger triangle on the larger gear, which everything fits into. In reference to my image, the blue triangle is where the smaller gear should fit in, and the green circles are where the bushings go. You could fill the gaps with three small nuts of similar size, and have no loss of performance. I've never seen anything like it before, but because two gears within the motor do not fit together, Ford puts three bushings in between the gears in order to fill the gaps (they are two triangular gears of very different sizes). I went online and bought a new set of bushings when mine died, and when I went to install it, I found that it really isn't necessary (or reliable) to replace the bushings with expensive OEM parts. I've heard it is a common problem in Ford cars. If you hear the motors, and they make noise when you press the button, it is probably not the motors that are failing, but broken bushings within them.
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