| 摘要 |
<p>A power transmission has a housing comprised of an end support, a casing, an end cover; an input shaft (46); an output shaft (48); and a pair of identically dimensional countershafts (42,44). Each countershaft has a pair of ratio gears (125,150, 174,188) rotatably disposed thereon and meshing with respective output gears (202-208) rotatable with the output shaft and a friction clutch (132) is provided for each ratio gear. A reverse gear pair (146,190) has one gear member connectible to one countershaft by a synchronizer clutch (187) and one of the friction clutches and the other gear member drivingly connected with a ratio gear on the other countershaft. A park pawl secured to one of the reverse gear members is provided to obtain a park gear having a torque ratio greater than one with the output shaft thereby providing improved disengagement loading in the park system. <IMAGE></p> |
