How many miles should I change my transmission fluid? Is there a specific mileage threshold that warrants this crucial maintenance task? Some automotive experts assert that transmission fluid should be replaced every 30,000 to 60,000 miles, while others propose a more lenient interval, potentially stretching it beyond 100,000 miles. What factors influence this decision? Could the type of driving — such as frequent stop-and-go city driving versus smooth highway travel — play a significant role in determining the optimal mileage for fluid replacement? Moreover, how do varying conditions, such as extreme temperatures or towing heavy loads, impact the longevity of transmission fluid? Are there particular signs or symptoms, including unusual noises or slipping gears, that indicate it might be time for a change even before reaching those mile markers? In what ways can neglecting this maintenance compromise the health of my vehicle over time? The implications of these questions are profound, aren’t they?