How often should the transmission fluid in a car be changed?
2 Answers
The replacement of transmission fluid in a car does not have a fixed interval. Different car models and different types of transmission fluid have varying replacement cycles. Generally, automatic transmission fluid should be changed every two years or approximately every 50,000 to 80,000 kilometers. Manual transmissions, being more mature in technology, have a longer service life compared to automatic transmission fluid, typically requiring replacement every three years or around 100,000 kilometers. Here are some details about transmission fluid: 1. When selecting and replacing transmission fluid, strictly follow the manufacturer's requirements and try to use the specific fluid designed for your vehicle. Avoid using counterfeit or substandard transmission fluid. 2. Transmission fluid is used in a car's transmission system to clean and lubricate the gear system, extend the life of the transmission components, and provides functions such as cleaning, lubrication, rust prevention, and heat dissipation. 3. Depending on the type of car transmission, transmission fluid can be categorized into manual transmission fluid and automatic transmission fluid.
The replacement interval for transmission fluid depends on the vehicle model and usage conditions. I usually refer to the maintenance manual, which recommends changing it every 40,000 to 60,000 kilometers for most cars. Automatic transmission models are more delicate—fluid degradation can cause gearshift jerking or even slippage. I've seen cases where owners neglected changes for 80,000 kilometers and ended up with complete transmission failure. Manual transmissions can extend to 80,000 kilometers, but regular fluid inspection is crucial—healthy fluid should appear translucent red; immediate replacement is required if it turns black or develops a burnt smell. Drivers frequently towing heavy loads or stuck in stop-and-go traffic should inspect at 30,000 kilometers, as high temperatures and intense friction accelerate fluid breakdown. Always use the OEM-specified fluid type during changes—mixing incompatible grades damages sealing components.
