In a single dry plate clutch, torsional vibrations are absorbed by

to vary the torque at the wheels

noise level and strength

Helical Gears have teeth that are set on an angle to the gear axis. Since the teeth engage more gradually, they have a smoother and quieter operation than spur gears. Helical gears also have greater tooth strength and a higher load carrying capacity. Further, helical gears can transmit power between either parallel or non-parallel shafts, while spur gears can only transfer power between parallel shafts. A downside to helical gears is they produce an axial thrust that needs to be accounted for; something not needed with spur gears.

selects the synchronizer

4 - speed gear box