That may be more of a headache than you want to deal with. [] My first thought was that you could pull the gear boxes out, pull the motors off, pull off the pinion gears on the motor shafts and replace them with two new ones of the same pitch.....but that won't work. First of all, the pinions that are on the motor shafts are pressed on, rather than tightened by a grub screw, so it will be a major pain in the rear end to get them off. [sm=thumbdown.gif]

The second problem is that the distance between the pinions and the first gears of the gear boxes have to remain the same in order to have the right gear mesh. More teeth on the new pinions means that the gears are bigger, which would cause the gears to bind since they would be too close. A smaller pinion with fewer teeth than the original would make the gears too far apart and they would skip or not meet at all.

The only way that you could change those gears would be to somehow get the old pinions off, replace them with new pinions of the same pitch and drill new holes for the motors to attach to in the gear boxes. For that to work, you would probably have to measure the diameter of one of the stock pinions, as well as the diameter of one of the new ones, and drill new holes the measured distance from the center of the original hole, toward the first gear. You might be able to make a slot for one of the motor mount screws that would allow you to slide the motor and pinion toward or away from the first gear, until you got the correct mesh, and then tighten it down (a thin piece of paper between the gears to get the correct mesh). However, it could work loose and cause the gears to misalign.

Hell, I don't know.

My head hurts.

Jason