To determine the Low gear ratio, multiply the ratios you've chosen for all of the other gears. In other words, a four-speed could have a Low gear ratio as low as 3.38:1 or as high as 1.95:1.

On August 26, 2025, information from the National Intellectual Property Administration indicated that Shanghai Automotive Transmission Co., Ltd. successfully obtained a patent titled "Lubrication ...

How Does an Automatic Transmission Work? A modern automatic transmission uses one or more sets of epicyclic or planetary gears (consisting of a sun, planets, and a ring gear) to achieve many ...