A continuously variable transmission , comprising: a first asymmetrical differential , having a transmission input shaft , a first output shaft and a second output shaft , the first output shaft and the second output shaft being aligned along a transmission axis ; a second asymmetrical differential , having a transmission output shaft , a first input shaft and a second input shaft , the first input shaft and the second input shaft being aligned along the transmission axis ; an independently rotatable high speed shaft coaxially passing through the first output shaft and the first input shaft , the high speed shaft being coupled to the second output shaft and the second input shaft ; wherein the second output shaft is a first low torque bevel gear , disposed at a first end of the high speed shaft and comprising a part of the first asymmetrical differential ; and wherein the second input shaft is a second low torque bevel gear , disposed at a second end of the high speed shaft and comprising a part of the second asymmetrical differential ; a one-way roller bearing clutch , disposed on the high speed shaft configured to prevent reverse rotation of the high speed shaft ; and a reduction gear unit , coupled between the first output shaft of the first asymmetrical differential and the first input shaft of the second asymmetrical differential , rotation of the transmission input shaft at a first input speed and torque being converted into rotation of the transmission output shaft at a second output speed and torque that varies independently of the first input speed and torque in response to a rotational resistance on the transmission output shaft , and a degree of torque transmitted via the high speed shaft to the transmission output shaft being inversely proportional to a magnitude of rotation of the reduction gear unit , wherein the high speed shaft extends through the reduction gear unit . a first asymmetrical differential , having a transmission input shaft , a first output shaft and a second output shaft , the first output shaft and the second output shaft being aligned along a transmission axis ; a second asymmetrical differential , having a transmission output shaft , a first input shaft and a second input shaft , the first input shaft and the second input shaft being aligned along the transmission axis ; an independently rotatable high speed shaft coaxially passing through the first output shaft and the first input shaft , the high speed shaft being coupled to the second output shaft and the second input shaft ; wherein the second output shaft is a first low torque bevel gear , disposed at a first end of the high speed shaft and comprising a part of the first asymmetrical differential ; and wherein the second input shaft is a second low torque bevel gear , disposed at a second end of the high speed shaft and comprising a part of the second asymmetrical differential ; a one-way roller bearing clutch , disposed on the high speed shaft configured to prevent reverse rotation of the high speed shaft ; and a reduction gear unit , coupled between the first output shaft of the first asymmetrical differential and the first input shaft of the second asymmetrical differential , rotation of the transmission input shaft at a first input speed and torque being converted into rotation of the transmission output shaft at a second output speed and torque that varies independently of the first input speed and torque in response to a rotational resistance on the transmission output shaft , and a degree of torque transmitted via the high speed shaft to the transmission output shaft being inversely proportional to a magnitude of rotation of the reduction gear unit , wherein the high speed shaft extends through the reduction gear unit . <EOS>