Abstract: A lubricating device lubricates various parts of a power transfer system for a vehicle. The lubricating device comprises a gear interconnected with an output shaft and splashes lubricating oil in an oil chamber. The splashed oil is received by a cover member and supplied to a passage for supplying the lubricating oil to a bushing for rotatably supporting an output shaft of the power transfer system. Therefore, even if the direction to which lubricating oil is splashed by the gear is changed according to an operating condition of the vehicle, the cover member securely receives the splashed oil and supplies it to the passage for the bushing.

Abstract: The power transmission apparatus comprises a center differential gear, a first inner front wheel drive hub connected to the center differential gear, a second outer rear wheel drive hub also connected to the center differential gear coaxially with the first hub, a ring gear fixed to the second hub, a pinion gear coupled to a propeller shaft and in mesh with the ring gear at a gearing position above the axis of the ring gear, and in particular a lubrication structure including a rotary cover member fixed to the second hub and formed with plural oil stirring projections, an oil sump formed in an inner surface of an apparatus housing, and an oil passage formed in a pinion gear housing.

Abstract: In a transfer for use in a transaxle for a four-wheel drive vehicle, a transfer shaft for transmission of power to rear wheels is drivingly connected to a ring gear which is in turn directly connected with a pinion gear in such a manner that a center axis of the pinion gear intersects a center axis of the ring gear at right angles and in such a manner that the center axis of the pinion gear is offset upward from the center axis of the ring gear.

Abstract: A four wheel drive system for a vehicle comprises a transverse power unit, a first (front) differential unit, an angular drive unit for changing the direction of torque path, a propeller shaft, and a second (rear) differential assembly between left and right permanent drive (rear) wheels which are always connected with the power unit through the differential case of the first differential unit, the angular drive unit, the propeller shaft and the second differential assembly. The first differential unit is provided between left and right nonpermanent drive (front) wheels. One of the nonpermanent drive wheels is simply connected with one side gear of the first differential unit by an axle shaft. The other nonpermanent drive wheel is connected with the other side gear of the first differential unit through a coupling unit, such as an orifice coupling, which can vary a driving torque distribution between the front and rear wheels by varying a transmission torque therebetween.