The eight speed transmission did wonders for some of the big RWD Mopars in terms of gas mileage and performance. And a new nine speed is slated for cars like the Dart and the new Cherokee pictured below. Chrysler just announced that they are investing $20 million to increase capacity at the Toledo Machining Plant for the torque converter they are machining for the nine-speed transmission. Read the press release at Chrysler.com