Abstract: A transmission capable of being assembled as a coolerless transmission and a transmission having an oil cooler includes a housing and a lubrication system. The oil passage system includes an oil passage having an oil outlet opening extending out of the housing and an oil inlet opening extending into the housing. A bypass flow passage is disposed in the housing in communication with the oil outlet opening and the oil inlet opening. In a coolerless configuration a pair of plugs are inserted in the oil outlet opening and the oil inlet opening, respectively, to close off the oil outlet opening and the oil inlet opening so that oil flows from the oil outlet opening to the oil inlet opening through the bypass flow passage. In a transmission configuration having an oil cooler, an exterior oil cooler is connected to the oil outlet opening and the oil inlet opening.

Abstract: A rear mount power take-off for a transmission includes a housing assembly configured to be mounted in an opening in the transmission. A power take-off shaft includes an externally splined end extending into an opening in the housing assembly and is configured to be driven by a component of the transmission. A guide sleeve is received in the housing assembly and includes an exterior shoulder opposing an interior retaining shoulder of the housing assembly, the guide sleeve further including an interior shoulder. A spring biases the guide sleeve against the interior retaining shoulder of the housing assembly. A coupler sleeve is secured to an interior of the guide sleeve and includes a first internal spline for selective engagement with the externally splined end of the power take-off input shaft and a second internal spline configured to engage a power take-off device.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.

Abstract: A hybrid automated mechanical transmission includes an input shaft having a first plurality of gears mounted thereon. The input shaft is configured to be drivingly engaged with an internal combustion engine by an input clutch. A countershaft system includes a second plurality of gears mounted thereon. A main shaft is coaxial with the input shaft and includes a third plurality of gears mounted thereon, the first and third plurality of gears being in driving engagement with the second plurality of gears. A range gear system selectively receives drive input from the main shaft and the countershaft system. An electric motor provides drive torque to one of the countershaft system and the range gear system.

Abstract: A transmission is subject to thermal management to prevent damage or failure due to overheating. Sensors can be employed to capture characteristics of a transmission, such as fluid temperature or pressure. Further, a predictive model can be invoked to predict characteristics based on current and future conditions. Characteristics can be compared with a threshold for intervention. A thermal mitigation strategy can be generated and initiated when characteristics satisfy the threshold. The thermal mitigation strategy can specify various actions to dissipate heat, including altering shift control logic and triggering mechanical devices that can increase airflow, reduce air temperature, or both surrounding the transmission.

Abstract: A transmission capable of being assembled as a coolerless transmission and a transmission having an oil cooler includes a housing and a lubrication system. The oil passage system includes an oil passage having an oil outlet opening extending out of the housing and an oil inlet opening extending into the housing. A bypass flow passage is disposed in the housing in communication with the oil outlet opening and the oil inlet opening. In a coolerless configuration a pair of plugs are inserted in the oil outlet opening and the oil inlet opening, respectively, to close off the oil outlet opening and the oil inlet opening so that oil flows from the oil outlet opening to the oil inlet opening through the bypass flow passage. In a transmission configuration having an oil cooler, an exterior oil cooler is connected to the oil outlet opening and the oil inlet opening.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A controller controls the shift actuator utilizing an actuating pulse and an opposing pulse.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing includes a single external power access for the shift actuator. A controller interprets a shaft displacement angle, determines if the transmission is in an imminent zero or zero torque region, and performs a transmission operation in response to the transmission in the imminent zero or zero torque region.

Abstract: A transmission includes a transmission main housing, an intermediate plate secured to the transmission main housing; and a rear housing attached to the intermediate plate. An input shaft is connected to an extension shaft including a plurality of splitter gears selectively couple-able to the extension shaft. A main shaft is rotatably supported on the extension shaft and includes a plurality of main box gears selectively couple-able to the main shaft. A range shaft is drivingly connected to the main shaft and provides input to a planetary gear assembly, the range shaft being supported by a first bearing disposed within the intermediate plate and further including a bore disposed within a forward end. The extension shaft is supported at a first end by a bearing assembly within a partition wall and a second end is supported by a bearing assembly disposed within the bore in the range shaft.

Abstract: A transmission includes an input shaft and an output shaft, the input shaft selectively accepting a torque input from a prime mover, and the output shaft selectively providing torque output to a driveline. A controller determines a shaft displacement angle representing an angle value of rotational displacement difference between at least two shafts of the transmission, and performs a transmission operation responsive to the shaft displacement angle.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing includes a single external power access for the shift actuator. A controller interprets a shaft displacement angle, determines if the transmission is in an imminent zero or zero torque region, and performs a transmission operation in response to the transmission in the imminent zero or zero torque region.

Abstract: A synchronizer assembly includes a pair of engageable members each including an exterior cone surface and first exterior splines. A central synchronizer ring is disposed between the pair of engageable members and having second exterior splines. A pair of synchronizer cone rings are disposed on opposite sides of the central synchronizer ring and each include third exterior splines and an interior cone surface that oppose the exterior cone surface of respective ones of the pair of engageable members. A sliding synchronizer sleeve engages the second exterior splines of the central synchronizer ring and movable for engaging the third exterior splines of the pair of synchronizer cone rings and the first exterior splines of the pair of engageable members. A plurality of interlocking clips engage the pair of synchronizer cone rings.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A shift control circuit operates a shift actuator using a first opposing pulse command and a first actuating pulse command, and releases pressure with shift actuating and opposing volumes of the shift actuator upon determining a shift completion event.

Abstract: A hybrid automated mechanical transmission includes an input shaft having a first plurality of gears mounted thereon. The input shaft is configured to be drivingly engaged with an internal combustion engine by an input clutch. A countershaft system includes a second plurality of gears mounted thereon. A main shaft is coaxial with the input shaft and includes a third plurality of gears mounted thereon, the first and third plurality of gears being in driving engagement with the second plurality of gears. A range gear system selectively receives drive input from the main shaft and the countershaft system. An electric motor provides drive torque to one of the countershaft system and the range gear system.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. A shift actuator selectively couples the input shaft to the main shaft by rotatably coupling gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. An integrated actuator housing is operationally coupled to the shift actuator and a linear clutch actuator. The linear clutch actuator is a self-adjusting actuator, and the transmission includes a self-adjusting clutch.

Abstract: A transmission includes an input shaft coupled to a prime mover, a countershaft, main shaft, and an output shaft, with gears between the countershaft and the main shaft. The shift actuator is mounted on an exterior wall of a housing including the countershaft and the main shaft. A shift control circuit operates a shift actuator using a first opposing pulse command and a first actuating pulse command, and releases pressure with shift actuating and opposing volumes of the shift actuator upon determining a shift completion event.