Car transmissions go hi-tech.

NEW YORK - Do you know how many gears your car's transmission has? If you're like most people, you'll probably guess "four." And you'll probably be right. But, with gas getting more expensive and engineering getting more advanced, that number is rising. We're also seeing some cars with "continuously variable" transmissions that, instead of having set "gears" change gear ratios in a smooth, linear fashion.