Patent ID: 8156837
Filing Date: 2012-04-17
Classification: F16H,Y10T

Abstract:
1. A multiple-ratio transmission in a vehicle powertrain comprising gearing including gear elements mounted on a transmission mainshaft and on a transmission countershaft; an assembly of shift rails having at least one long shift rail, each of the shift rails of the assembly of shift rails being parallel to a longitudinal axis of the transmission mainshaft; a first positive engagement clutch adjacent a first gear element and a second positive engagement clutch adjacent a second gear element; a first shift fork adapted to shift the clutch for the first gear element into and out of engagement; a second shift fork adapted to shift a clutch for the second gear element into and out of engagement; the first shift fork being fixed to the long shift rail and the second shift fork being slidably supported on the long shift rail; an actuator for each shift rail, each actuator being adapted to selectively shift at least one of the shift rails in a longitudinal direction parallel to the mainshaft axis; and a support wall adapted to support the mainshaft and countershaft therethrough, each of the shift rails of the assembly of shift rails slidably supported by the support wall.