Besides the gearbox, in what other mechanism of the transmission system is the gear reduction ratio between the engine and the drive wheels altered?

Question

DentroTest · Accepted Answer

The overall transmission ratio between the engine and the drive wheels is modified at two main points of the drivetrain: in stages or continuously in the gearbox (through the different gears) and in a fixed and permanent way in the bevel gear unit (drive pinion and crown wheel). The bevel gear unit not only turns the rotation 90 degrees to direct it toward the wheels, but also produces a fixed gear reduction that reduces the revolutions and multiplies the torque. For their part, the crosspieces of the driveshaft are articulations designed to transmit rotation between non-aligned shafts without changing the rotation ratio, and the differential (spider gears and side gears) has the function of compensating for the difference in distance traveled by the wheels in curves, without altering the overall transmission ratio.

Besides the gearbox, in what other mechanism of the transmission system is the gear reduction ratio between the engine and the drive wheels altered?

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