HELICAL BEVEL DRIVE-

All about engine/remains helical cut
Into pinion gear and crown wheel in this type, and the pinion gear stays connect in the center of crown wheel due to the helical cut between pinion gear and crown wheel, the ground clearance it happens to increase because of the connect pinion gear in the center of crown wheel in this type, but the good news is this type of gear in high in age like this gear does lasts very long, and not gives sound besides not ronning the gear, thank you