A new 6-speed manual transmission for 3 L class engines has been developed as Honda’s top-of-the-line manual transmission. To be mounted on different models, this transmission was given the capability to employ a wide range of gear ratios and to handle high torque while keeping its total length equal to transmissions for 2 L class. Computer aided engineering (CAE) analysis was used to enhance the gear stiffness in order to cope with higher power outputs. The inside surface of the case was made smooth and a force feed lubrication system driven by an oil pump has been used to reduce oil agitation loss in order to curb a rise in oil temperature at high travel speeds. Much emphasis was put on reducing the weight of each component, which resulted in a 3 L class transmission with the weight equal to 2 L class. In order to realize the level of quality appropriate for our top-of-the-line vehicles, the transmission has been equipped with a constant-mesh reverse gear and a dual mass flywheel.
Article of Honda R&D Technical Review Vol.14 No.2 (37 - 44)