Equalizing unit of a drive train of a motor vehicle and its construction for loss-minimizing oiling on demand

A power takeoff unit for a powertrain of a vehicle including a permanently powered primary part for powering primary powered wheels of the vehicle and a secondary part for powering secondary powered wheels, the power takeoff unit comprising:

• a first member configured to rotationally engage the primary part;
• a second member connectable with the first member and configured to rotationally engage the secondary part;
• and
• a braking device for decelerating the second member when the second member is disconnected from the first member.

A power takeoff unit for a powertrain of a vehicle including a permanently powered primary part for powering primary powered wheels of the vehicle and a secondary part for powering secondary powered wheels, the power takeoff unit comprising:

• a first member for being rotationally engaged with the primary part;
• a second member for being rotationally engaged with the secondary part;
• a synchronizing device engaged with the second member and movable between a position disengaged with the first member and a position engaged with the first member;
• and
• a friction surface between the synchronizing device and a rotationally fixed component for braking the second member when the synchronizing device is disengaged with the first member.