Didn't see anything holding the gears up. I wish I had a digital camera. The only thing securing the drive together are screws. The way the drive is suspended in the chassis is with small springs on each corner (rectangle). At the front of the drive (at the corners) there are 2 soft beige-ish things that look like pyramids that the drive sticks a ball into. Then there's one in the back in the center. Could these be the pillars? Thing is, they're not touching the gears, but they definitely are holding the drive up (I guess for shock protection or something).
Does anyone know any site that describes the types of CD mechanisms in car radios? I'm lost when I don't even know what I'm looking at.