Patent ID: 7070534

Claim:
A power transmission comprising: a power input shaft; a first transmission input shaft; a second transmission input shaft; a first clutch selectively operatively connectible between said power input shaft and said first transmission input shaft; a second clutch selectively operatively connectible between said power input shaft and said second transmission input shaft; first and second ratio gears drivingly connected with said first transmission input shaft; third and fourth ratio gears drivingly connected with said second transmission input shaft; a first countershaft; a second countershaft; fifth and sixth ratio gears rotatably mounted on said first countershaft and meshing with said first and second ratio gears respectively; first mechanical clutch means for selectively interconnecting said fifth and sixth ratio gears with said first countershaft; seventh and eighth ratio gears rotatably mounted on said second countershaft; second mechanical clutch means for selectively interconnecting said seventh and eighth ratio gears with said second countershaft; a splitter planetary gearset having a first member, a second member continuously connected with a stationary transmission member, and a third member continuously connected with a transmission output shaft; a first splitter input gear continuously connected with said first member; a second splitter input gear continuously connected with said third member and said output shaft; a first splitter control gear meshing with said first splitter input gear and being rotatably mounted on said first countershaft; a second splitter control gear meshing with said second splitter input gear and being rotatably mounted on said first countershaft; a third mechanical clutch means for selectively connecting said first and second splitter control gears with said first countershaft; a third splitter control gear rotatably mounted on said second countershaft; a fourth splitter control gear rotatably mounted on said second countershaft; a fourth mechanical clutch means for selectively connecting said third and fourth splitter control gears with said second countershaft; said first clutch, said first mechanical clutch, and said third mechanical clutch being selectively operable to establish four forward speed ratios between said first transmission input shaft and said transmission output shaft; and said second clutch, said second mechanical clutch, and said fourth mechanical clutch being operable to establish four forward speed ratios between said second transmission input shaft and said transmission output shaft.