Learn more. Taking care of your car or truck's transmission is important for its long-term health. But all too often, car owners misunderstand the basic maintenance that's needed to keep a gearbox ...

In our tests, we've found that in some cars a manual transmission can improve gas mileage by a significant 2 to 5 mpg, compared with an automatic, and can cut a car's price by $800 to $1,200.