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Gear Oil

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18. We used regular DOT 3 brake fluid in the brake system rather than the higher-temp DOT 5 just because it is easier to find in the back of beyond. As for the axles, Currie Enterprises provides proprietary 85W-140 hypoid gear oil when the axles go out the door. The company says that because of the added distance from the center of the pinion to the center of the axleshaft, oil with exceptionally high shear characteristics should be used for the longest life possible.