The recommended timing for changing transmission fluid depends on the type of transmission and driving conditions:
- For automatic transmissions , manufacturers generally recommend changing transmission fluid between 60,000 and 100,000 miles (around 96,000 to 160,000 kilometers). If you drive in heavy traffic, tow heavy loads, or have severe driving conditions like extreme heat, you should consider changing the fluid more frequently, closer to the 60,000-mile mark.
- For manual transmissions , fluid changes are usually recommended every 30,000 to 60,000 miles (approximately 48,000 to 96,000 kilometers). Some manufacturers suggest even more frequent changes, such as every 25,000 kilometers, if the vehicle undergoes intense use.
Important factors influencing the need to change transmission fluid earlier include stop-and-go city driving, towing, driving on hills, and older vehicle age. Signs that your transmission fluid may need changing include difficulty shifting gears, slipping gears, strange noises, surging, and delayed acceleration. Additionally, for vehicles with very high mileage that have never had their transmission fluid changed, it might be risky to flush the fluid completely as it can cause damage; instead, a fluid change without flushing is advised. In summary, check your vehicle's manual for manufacturer- specific guidance, but a good general rule is:
- Automatic transmission fluid: Change every 60,000 to 100,000 miles.
- Manual transmission fluid: Change every 30,000 to 60,000 miles or as specified.
Pay attention to your transmission's performance and fluid condition to avoid problems.
