Transmission fluid change , like a oil change but transmission fluid
transmission fluid helps cool automatic transmissions. A transmission fluid change replaces it with new fluid that will help cool better. Make sure to get one around 50k miles. Transmissions are the most expensive parts after the engine, so you don't want one overheating and breaking. Lastly, don't trust the the fluid being good for the "lifetime." That just means it's good for the cars warranty which could be around 60k or 80k miles, not 100k or 200k miles, which a toyota can easily reach.
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