A transmission includes a main shaft having two or more main shaft clutches that couple gears to at least one countershaft, and an automated manual transmission coupled to the main shaft via the at least one countershaft. The automated manual transmission includes a front input shaft coupled directly to a main clutch and having a first clutch coupleable to the at least one countershaft, and a rear input shaft coupled to the front input shaft and having a second clutch coupleable to the at least one countershaft. The automated manual transmission is operable to selectively engage the first clutch and the second clutch.

A transmission includes a main shaft having two or more main shaft clutches that couple gears to at least one countershaft, and an automated manual transmission coupled to the main shaft via the at least one countershaft. The automated manual transmission includes a front input shaft coupled directly to a main clutch and having a first clutch coupleable to the at least one countershaft, and a rear input shaft coupled to the front input shaft and having a second clutch coupleable to the at least one countershaft. The automated manual transmission is operable to selectively engage the first clutch and the second clutch.

A transmission includes a main shaft having two or more main shaft clutches that couple gears to at least one countershaft, and an automated manual transmission coupled to the main shaft via the at least one countershaft. The automated manual transmission includes a front input shaft coupled directly to a main clutch and having a first clutch coupleable to the at least one countershaft, and a rear input shaft coupled to the front input shaft and having a second clutch coupleable to the at least one countershaft. The automated manual transmission is operable to selectively engage the first clutch and the second clutch.

A multiple hydraulic multi-plate clutch transmission includes an input shaft (IS); hydraulic multi-plate clutches arranged on the input shaft and each engaged with or disengaged from the input shaft; one or more drive gears (G) provided on each hydraulic multi-plate clutch; first and second output shafts (OS1) and (OS2) disposed parallel to the input shaft (IS); speed gears (D) provided on the first or second output shaft and engaging with any one of the drive gears; and gear selectors (S) provided between some of the speed gears of the first and second output shaft and each always connected to the corresponding speed gear and disposed such that no neutral disengaged state is present. At least three speed gears of one or more higher and one or more lower gear stages than a gear stage associated during driving are maintained in a pre-selected state so as to prepare acceleration or deceleration.

A transmission includes a main shaft having two or more main shaft clutches that couple gears to at least one countershaft, and an automated manual transmission coupled to the main shaft via the at least one countershaft. The automated manual transmission includes a front input shaft coupled directly to a main clutch and having a first clutch coupleable to the at least one countershaft, and a rear input shaft coupled to the front input shaft and having a second clutch coupleable to the at least one countershaft. The automated manual transmission is operable to selectively engage the first clutch and the second clutch.

A transmission includes a main shaft having two or more main shaft clutches that couple gears to at least one countershaft, and an automated manual transmission coupled to the main shaft via the at least one countershaft. The automated manual transmission includes a front input shaft coupled directly to a main clutch and having a first clutch coupleable to the at least one countershaft, and a rear input shaft coupled to the front input shaft and having a second clutch coupleable to the at least one countershaft. The automated manual transmission is operable to selectively engage the first clutch and the second clutch.

A transmission including: a first number of input shafts; an output shaft; a second number of gears non-rotatably connected to the output shaft; a third number of lay shafts; and full synchronizer clutches. Each full synchronizer clutch includes: a respective first half synchronizer clutch arranged to non-rotatably connect a respective first gear to a respective lay shaft included in the third number of lay shafts, and disconnect the respective first gear from the respective lay shaft; and a respective second half synchronizer clutch arranged to non-rotatably connect a respective second gear to the respective lay shaft, and disconnect the respective second gear from the respective lay shaft. The transmission is arranged to provide a fourth number of total reverse and forward speed ratios equal to the first number multiplied by the second number multiplied by the third number.