Describe what a transmission fluid change involves.

A transmission fluid change involves a systematic process aimed at ensuring that the transmission operates efficiently and remains in good condition. Draining the old fluid removes contaminated and degraded fluid that can lead to poor transmission performance and potential damage. Replacing the filter is crucial, as the filter traps debris and contaminants; a clogged filter can restrict fluid flow and reduce the effectiveness of the transmission. Finally, refilling the transmission with new fluid replenishes the system with fresh lubricant, which is essential for proper operation and longevity of the transmission components.

This comprehensive approach is necessary for maintaining the health of the transmission, whereas simply adding new fluid without draining can dilute old contaminants and may not provide the necessary benefits. Cleaning the exterior of the transmission does not address the internal fluid quality and is not sufficient maintenance. While engine oil changes are also essential vehicle maintenance tasks, changing engine oil simultaneously with transmission fluid is not standard practice, as they serve different functions and systems within the vehicle. Thus, the correct method of a transmission fluid change includes all the critical steps of draining old fluid, replacing the filter, and refilling with new fluid to ensure optimal performance.