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Spool Gearset

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Fenzel used an indicator to get just the right setup when he dropped the spool and gearset into the 14-bolt axle. The spool will not only be the lightest differential (or lack thereof) we could put in the axle, but will also allow the most fluid capacity, and generate the least amount of heat as there is no spin differentiation between the two axles. Spools are great off road and very predictable, but they get tiresome on road and are almost unbearable (on road).