Abstract: A torque proportioning differential utilizing helical face side gears and helical pinions is disclosed which is equivalent in torque capacity and interchangeable with bevel gear differentials in the same case and which is economical to manufacture.A differential structure, interchangeable with bevel gear differential components in the same case, composed of a drive cage in which are pocketed up to 8 helical pinions; two helical face side gears in concentric relationship on each side of the cage with teeth engaging the helical pinions; thrust-friction plates fixed alternately to the side gears and the cage and spring mechanism for pre-loading the friction plates. The helical face side gears connect with axle shafts to drive the load.

Abstract: A bevel gear set for particular use in providing a variable leverage torque proportioning effect in a differential. The bevel gear set includes a gear with bevel teeth and a pinion with bevel teeth which mesh and which meshing teeth have lines of contact. The lines of contact have midpoints or midportions which coincide with a given plane of rotation of the gear which has the bevel teeth as distinguished from the pinion.