An automated truck transmission, comprising: a transmission housing, an input shaft configured to couple to a prime mover for receiving torque therefrom, the input shaft having a first plurality of gear (810, 812) coupleable thereto; a countershaft (902, 904) having a second plurality of gears mounted thereon; a main shaft (804, 806) having a third plurality of gears (814, 816, 818) rotatably mounted thereon, the first plurality of gears (810, 812) and the third plurality of gears (814, 816, 818) are in meshing engagement with respective ones of the second plurality of gears; an output shaft selectively providing a torque output to a driveline; a shift actuator structured to engage a plurality of shift forks to selectively couple the input shaft to the main shaft (804, 806) by rotatably coupling at least one of the first plurality of gears (810, 812) to the input shaft and the third plurality of gears (814, 816, 818) to the main shaft (804, 806), wherein the shift actuator is mounted on an exterior wall of the transmission housing, and wherein the countershaft (902, 904) and the main shaft (804, 806) are at least partially positioned within the housing; an integrated actuator housing, wherein the shift actuator is operationally coupled to the integrated actuator housing, and further comprising a clutch actuator housing mounted to the integrated actuator housing, wherein a linear clutch actuator is positioned at least partially within the clutch actuator housing, characterized in that the linear clutch actuator is a self-adjusting actuator and the transmission further comprises a self-adjusting clutch that is actuated by the linear clutch actuator. a transmission housing, an input shaft configured to couple to a prime mover for receiving torque therefrom, the input shaft having a first plurality of gear (810, 812) coupleable thereto; a countershaft (902, 904) having a second plurality of gears mounted thereon; a main shaft (804, 806) having a third plurality of gears (814, 816, 818) rotatably mounted thereon, the first plurality of gears (810, 812) and the third plurality of gears (814, 816, 818) are in meshing engagement with respective ones of the second plurality of gears; an output shaft selectively providing a torque output to a driveline; a shift actuator structured to engage a plurality of shift forks to selectively couple the input shaft to the main shaft (804, 806) by rotatably coupling at least one of the first plurality of gears (810, 812) to the input shaft and the third plurality of gears (814, 816, 818) to the main shaft (804, 806), wherein the shift actuator is mounted on an exterior wall of the transmission housing, and wherein the countershaft (902, 904) and the main shaft (804, 806) are at least partially positioned within the housing; an integrated actuator housing, wherein the shift actuator is operationally coupled to the integrated actuator housing, and further comprising a clutch actuator housing mounted to the integrated actuator housing, wherein a linear clutch actuator is positioned at least partially within the clutch actuator housing, characterized in that the linear clutch actuator is a self-adjusting actuator and the transmission further comprises a self-adjusting clutch that is actuated by the linear clutch actuator.