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Originally Posted by eschaider
Actually there is another option.
It is possible to build a one piece countershaft with gears that can be slid into position and located with either fastners like spirolocks or simply spacers that position the gears opposite their corresponding driven gear on the mainshaft. A nice colllateral benefit if a gear failure were encountered would be the ability to replace only the failed gear(s) not the entire countershaft.
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I think the Richmond 5 speed is made this way, each gear slides on its shaft. But, I would think it is more expensive to make a tranny this way, a little more parts, a little more assembly. I would think most people are fine with the "standard" tranny gear ratio's, and don't need custom ratio's. Obvioulsy, if you are going to offer a tranny with multiple ratio's, like jerico, G-Force, richmond, then in the long run I bet it is cheaper to design a tranny with separate gears than build multiple different ratio trannys.