Rusty transmission cooler lines in vehicles can lead to low transmission fluid levels, jeopardizing the efficiency and durability of the transmission system. Corrosion compromises the integrity of the lines, causing leaks that result in fluid loss over time. Insufficient transmission fluid can lead to overheating, increased friction, and premature wear on vital components. Addressing this issue promptly is crucial to prevent potential transmission failure and ensure the vehicle’s continued safe and reliable operation.