(under subclass 335) Transmissions, wherein the shifting is accomplished either by means responsive to the speed of some part of the transmission or by means responsive to both speed and torque conditions of the transmission.
SEE OR SEARCH CLASS
192, Clutches and Power-Stop Control,
103+, for speed responsive clutches.
475, Planetary Gear Transmission Systems or Components,
254+, for condition responsive control of planetary gearing.