| 摘要 |
A multiple ratio power transmission mechanism for a vehicle driveline comprising synchronized torque transmitting gears located on a pair of countershafts in parallel disposition with respect to a torque input shaft for establishing torque flow paths of differing speed ratios with minimum axial dimensions, the torque flow path through the fourth forward driving speed ratio including an overrunning clutch, and an overdrive ratio gear system with a fifth speed ratio synchronizer clutch means for establishing a mechanical torque delivery path around the overrunning clutch during overdrive operation, the countershafts being geared to a differential ring gear through which driving torque is delivered to oppositely disposed axle shafts.
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