General information about manual transmission (Mazda3 BK (Axela) 2003-2009: Transmission: Mechanical gearbox)

The gearbox converts the torque transmitted from the engine in magnitude and direction. This is necessary to ensure optimal speed and cross-country ability of the car, high efficiency of the engine and the car in reverse. In addition, the gearbox separates the engine and transmission when the vehicle is stopped and parked, as well as when it coasts with the engine running.

All manual transmission models are equipped with a five-speed gearbox combined with a differential and final drive. Torque from the engine is transmitted through the gearbox and final drive to the differential, which in turn distributes it between the drive shafts.

The five-speed manual transmission is equipped with a synchronization mechanism for all gears.

Pic. 3.24. Cross section of a Mazda 3 manual transmission: 1 – a leading gear wheel of 1st transfer; 2 – a leading gear wheel of the 2nd transfer; 3 – a leading gear wheel of the 3rd transfer; 4 – a leading gear wheel of 4th transfer; 5 – a leading gear wheel of 5th transfer; 6 - reverse gear; 7 - driven gear 1st gear; 8 - driven gear 2nd gear; 9 - driven gear 3rd gear; 10 - driven gear of the 4th gear; 11 - driven gear of the 5th gear; 12 - synchronizer clutch (reverse gear); 13 - intermediate reverse gear; 14 - differential

Pic. 3.25. Transmission in the block with the final drive: 1 - stuffing box (differential); 2 – vehicle speedometer sensor; 3 – a mechanical transmission in the block with the main transfer; 4 - switching mechanism; 5 - gearbox oil