Systems and methods for providing adjustable lubrication to a tandem axle

A method, comprising:

• adjusting an oil level in an axle sump of a tandem axle based on an axle configuration of the tandem axle, the axle sump selectably coupled to an external reservoir via a first oil passage and a second oil passage, the first oil passage including an electric pump, the second oil passage including a valve, and the tandem axle coupled to a drivetrain of a motor vehicle, wherein while the tandem axle operates with a first axle configuration, a drive shaft of an engine provides torque to a first axle and a second axle, each of the first axle and the second axle coupled to at least two wheels;
• and
• while the tandem axle operates with a second axle configuration, the drive shaft of the engine provides torque to the first axle and does not provide torque to the second axle.

A method, comprising:

• responsive a tandem axle transitioning from a 6×4 axle configuration to a 6×2 axle configuration, adjusting an oil level in an axle sump of the tandem axle to a first threshold level, the axle sump of the tandem axle selectably coupled to an external reservoir;
• and
• responsive to the tandem axle transitioning from the 6×2 axle configuration to the 6×4 axle configuration, adjusting the oil level in the axle sump of the tandem axle to a second threshold level, the second threshold level higher than the first threshold level.