Ditto for automatic transmission fluid, which some manufacturers say can last 100,000 miles in normal use. But what about ...

While engine oil, coolant, and brake fluid are regularly mentioned ... the fluid protecting your manual transmission every 30 ...

Whether you’re new to car care or just looking for a refresher, here’s what you need to know to keep your vehicle in top shape ... s time for a change. Transmission Fluid: Check Monthly ...