Which components are monitored by the Cascadia maintenance system?

The correct choice highlights that the Cascadia maintenance system focuses on critical drivetrain components, which include the engine, transmission, and Detroit axles. The engine is a fundamental component, responsible for generating power, while the transmission facilitates the transition of that power to the wheels. The inclusion of Detroit axles is significant since they are specifically designed to work seamlessly with Detroit products, enhancing overall performance and reliability. This combination allows for comprehensive monitoring and maintenance strategies that are crucial for maximizing vehicle uptime and operational efficiency.

In contrast, other options include components that are either too broad or not directly addressed by the Cascadia's maintenance system. For instance, options mentioning rear axles or brake systems may not specifically align with the essential components outlined for monitoring under the Cascadia system.