Six Speeds for the Price of Four: A Simple and Compact Automatic Transaxle

A novel transaxle configuration combines two main concepts. The first of these achieves spacing of six forward and two reverse gear ratios that is unparalleled for a planetary geartrain. The second concept keeps the transaxle from being any more complex than current production four-speed transaxles, as well as providing ancillary benefits such as enhanced torsional damping and improved durability of planet pinion bearings. Also presented is a powertrain configuration that utilizes a “T-drive” variation of the six-speed transaxle, but with its horizontally opposed engine mounted longitudinally.