Abstract: A continuous automatic variable speed transmission comprising an input sun gear 14 or receiving rotational power, an input differential gear 38A meshed with the input sun gear 14, an output differential gear 42A and a reverse rotation differential gear 46A integrally formed with the input differential gear 38A, a transmission differential gear 54A meshed with the input differential gear 38A, a medium speed differential gear 58A integrally formed with the transmission differential gear 54A, locking pins 36A, 52A and carriers 32, 34 supporting each differential gear, an output sun gear 24 integrally formed with an output shaft 22 and meshed with the inside of the output differential gear 42A, a medium speed sun gear 28 integrally formed with a medium speed control shaft 26 and meshed with the inside of the medium speed differential gear 58A, a reverse rotation sun gear 18 integrally formed with a reverse rotation control shaft 16 and meshed with the inside of the reverse rotation differential gear 46A, a low sp

Abstract: A transmission having an input shaft with an input sun gear and a reverse rotation control shaft with a reverse rotation sun gear rotatably secured to the input shaft. A first and a second carrier, terminating in an output shaft, are rotatably secured on the reverse rotation control shaft and input shaft, respectively. Locking pins interconnect the first and second carriers to enable simultaneous rotation of the carriers. Input planetary gears are in mechanical communication with the input sun gear. A reverse rotation planetary gear and an input planetary gear are interconnected and each such interconnected gear is rotatably mounted on a locking pin to enable simultaneous rotation of the interconnected gears about the locking pin. Each reverse rotation planetary gear is in mechanical communication with the reverse rotation sun gear. A low speed ring gear is rotatably secured on the second carrier.