The use of a gear differential unit is becoming a major trend in the touring car class that use very high power brushless motor technology. The Tamiya Gear Differential Unit uses oils with different viscosity to attain adjustment, which results in optimum power transmission from the high-power brushless motors in the market today. It also improves traction and acceleration. TRF Driver Marc Rheinard uses these units in the front and rear of his TRF417 when racing on carpet to minimize diff rebuilds that are common when using a traditional ball diff unit. The unit is fully enclosed and the built-in gears are less likely to wear out compared with ball differentials.
