How often should the transmission fluid be changed?

The recommendation to change transmission fluid every 30,000 to 60,000 miles is based on the need to maintain the transmission in optimal working condition. Over time, transmission fluid can break down and become contaminated with debris and metal particles from the transmission components. This degradation can lead to poor shifting performance, slipping, and eventual transmission failure if the fluid is not replaced at appropriate intervals.

Routine fluid changes help to remove these contaminants and replace the degraded fluid, thereby ensuring better lubrication and protection for the transmission gears and components. Additionally, maintaining clean fluid can enhance the overall efficiency and longevity of the transmission.

While some manufacturers have specific guidelines that may suggest different intervals, the 30,000 to 60,000-mile range has been widely accepted as a good standard for many vehicles to prevent costly repairs and ensure reliable operation.