What does Tech B state about the importance of changing rear axle oil after an axle failure?

Changing rear axle oil after an axle failure is crucial because it helps prevent further damage to the axle and related components. During an axle failure, metal shavings, debris, and contaminants can be released into the axle oil. This contaminated oil can cause friction and wear on the remaining components, potentially leading to additional failures like bearing damage or differential problems. By replacing the oil, you ensure that the new lubricant can properly lubricate the gears and bearings, thus maintaining optimal performance and longevity of the axle assembly. Regular maintenance, including oil changes after significant failures, is an essential aspect of extending the life of the vehicle’s drivetrain.