FUEL EFFICIENT AUTOMATIC FOUR-SPEED TRANSMISSION FOR LIGHT TRUCKS

Improved fuel economy has been the object of the design of an integral 4-speed automatic transmission for light trucks. This new overdrive unit features wide ratio gearing with 4-speeds and reverse from 2 planetary gear sets, a converter clutch assembly, a variable capacity oil pump and extensive use of aluminum. Unique construction of several components produces a compact transmission that weights only two pounds more than the 3-speed unit it replaces.