2ND GEAR 3RD PINIONAlways OEM - Nothing generic, "equivalent" or off-brand.
A gear or cogwheel is a rotating machine part having cut teeth or, in the case of a cogwheel, inserted teeth (called cogs), which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source. Gears almost always produce a change in torque, creating a mechanical advantage, through their gear ratio, and thus may be considered a simple machine. The teeth on the two meshing gears all have the same shape. Two or more meshing gears, working in a sequence, are called a gear train or a transmission. A gear can mesh with a linear toothed part, called a rack, producing translation instead of rotation.
When two gears are meshed together, the smaller gear is called a "pinion". The gear that transmits the force is referred to as a drive gear, and the receiving gear is called the driven gear. If a pinion is the driver, it results in a step down drive in which the output speed decreases and the torque increases.
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