Gearbox features Mazda 3

Mazda 3 Manual Transmission Features

The gearbox converts the torque transmitted from the engine in magnitude and direction

This is necessary to ensure optimal speed and patency of the car, high efficiency of the engine and reversing the car.

In addition, the gearbox separates the engine and transmission when the car 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.

Fig. 1 Cross-section of a manual transmission of a Mazda 3 car: 1 - 1st gear drive gear; 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
Fig. 2 Gearbox in the block with the main gear: 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

Possible malfunctions of a manual transmission and solutions

Vibration and noise in the gearbox:

- loosening or damage to the engine and gearbox mounts

Tighten fasteners or replace supports

- wear or damage to gears and bearings

Repair the gearbox

- the wrong brand of oil was filled in

Fill with the correct brand of oil

- insufficient oil level

Top up the oil to the correct level

- Violation of engine idle adjustment

Adjust engine idle

Difficult shifting and grinding noise when shifting:

- malfunction of the gearshift cables

Replace shift cables

- the wrong brand of oil was filled in

Fill with the correct brand of oil

- loose fit or wear of blocking rings and synchronizer cones

Repair the gearbox

- weakening of the synchronizer springs

Repair the gearbox

- incomplete engagement of the clutch

Repair the clutch release actuator and bleed the clutch system

Spontaneous disengagement of gears:

- wear of the shift forks or breakage of the springs of the clamps

Repair the gearbox

- increased clearance of the synchronizer clutch on the hub

Repair the gearbox

Oil leak:

- destruction or damage to oil seals or o-rings

Replace seals or O-rings