Tamiya 1/14 Truck Gearbox Upgrade Bron: RC Mart Brass Helical Gearbox Gears from Xtra Speed Firstly, some background on helical gears: different from your traditional spur and pinion where the teeth are aligned parallel relative to each other. In Helical Gears, the teeth on the gears are at an angle to each other and thus will result in a gradual engagement between the spur and pinion. Due to this gradual engagement between the teeth and the pinion on Helical gears, this results in a more quiet and smoother operation. This may seem like some high tech futuristic technology, but believe or not Helical Gears have been implemented in almost all transmissions in real cars. Onto the Helical Gear set by Xtra Speed, made from full brass which in turn gives a longer lifespan when compared to the plastic gears found in the kit gearbox. The Gears being brass also inherits the high thermal conductivity which allows the gears to be cooled at a very fast rate in the ever shifting gearbox inside that of a Tamiya Truck.
