High efficiency, high output transmission

A transmission, comprising:

• an input shaft configured to couple to a prime mover;
• a countershaft having a first plurality of gears mounted thereon;
• a main shaft having a second plurality of gears mounted thereon;
• an integrated actuator housing mounted on an exterior wall of a housing, and wherein the countershaft and the main shaft are at least partially positioned within the housing;
• a shift actuator structured to selectively couple the input shaft to the main shaft by rotatably coupling at least one of the first plurality of gears to the countershaft and the second plurality of gears to the main shaft, and wherein the shift actuator is operationally coupled to the integrated actuator housing, and wherein the shift actuator is accessible by removing the integrated actuator housing;
• a controller comprising:
• a shaft displacement circuit structured to interpret a shaft displacement angle, the shaft displacement angle comprising an angle value representative of a rotational displacement difference between at least two shafts of the transmission, and wherein the shaft displacement angle comprises at least one angle selected from the angles consisting of:
• an input angle comprising an angle value representative of a rotational displacement difference between the input shaft and the countershaft;
• a main box angle comprising a rotational displacement difference between the countershaft and an output shaft;
• and
• an output angle comprising a rotational displacement difference between the input shaft and the output shaft;
• and
• a torque input determination circuit structured to determine a prime mover torque value in response to the shaft displacement angle;
• and
• a displacement response circuit structured to provide, in response to the prime mover torque value.