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Rallye TO-4 Fluids meet or exceed Caterpillar’s newest heavy duty TO-4 transmission requirements, providing greater extended transmission durability over the previous TO-2 fluid. In the market place this fluid is referred to as a “TDTO” fluid. The Rallye TO-4 fluids may also be used as a diesel crankcase oil meeting the API CF and CF-2 performance classifications and wherever Allison C-4 fluid is recommended.
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