Which component has no separate oil supply in a tandem-axle drivetrain?

Which component has no separate oil supply in a tandem-axle drivetrain?

• A. Front axle differential
• B. Main differential
• C. Inter-axle differential
• D. Transmission

Answer: (C)

In a tandem-axle drivetrain, lubrication is organized around the gear train in each housing that directly drives a set of wheels. The front axle differential and the main differential each have their own dedicated oil in their respective housings, and the transmission has its own separate lubricant as well. The inter-axle differential sits in the center section between the two axle sets and doesn’t require a separate oil reservoir of its own; it’s lubricated by the oil in the center/transfer area, sharing the same sump as the rest of that section. That shared lubrication is why the inter-axle differential has no separate oil supply.

In a tandem-axle drivetrain, lubrication is organized around the gear train in each housing that directly drives a set of wheels. The front axle differential and the main differential each have their own dedicated oil in their respective housings, and the transmission has its own separate lubricant as well. The inter-axle differential sits in the center section between the two axle sets and doesn’t require a separate oil reservoir of its own; it’s lubricated by the oil in the center/transfer area, sharing the same sump as the rest of that section. That shared lubrication is why the inter-axle differential has no separate oil supply.