Differential unit and power transmission of a motor vehicle for loss-minimising oiling as needed

The balancing unit has (1) has drive units, input shaft and output shaft (4) that are connected to intermediate shaft (19) through coupling device (3) directly or indirectly by supplying oil to drive unit driven conveyor, such that plate wheel (5) is located in conveying direction. A ring gear is positioned with respect to oil feed pump in radial direction. Independent claims are included for the following: (1) method for constructing power train; and (2) power train assembly.