Most drivers probably don't know what a transmission valve body is, but it's an important part of your car that needs to stay ...

These, along with the transmission fluid, ensure optimum power delivery to the transmission for better acceleration. Besides the torque converter unit, an automatic transmission also uses a ...

Over the years, automatic transmissions have been gaining gears but losing dipsticks. Current models reach as high as nine speeds, and a dipstick for checking the transmission fluid has become rare.

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.