Reverse Idler Gear Assembly (With Synchronizing Mechanism)

Reverse Idler Gear Assembly (with Synchronizing Mechanism)
^ A constant-mesh type reverse gearing is used in the six-speed manual transmission.
^ The reverse idler gear assembly is provided with a double-cone synchronizer.





Soon after disengagement of the clutch, the reverse gear remains rotating by an inertial force. If the driver makes a shift while the reverse gear is still rotating, an undesirable "gear clash" would occur. The double-cone synchronizer prevents this by synchronizing the speed of the No. 2 reverse idler gear with that of the reverse sleeve. It also allows the driver to make a smooth shift into the reverse gear.





^ To prevent rattling noise that may occur with the constant-mesh type reverse gearing, No.1 reverse idler gear is fitted with a sub gear that has the same number of teeth as the No. 1 reverse idler gear. The sub gear is preloaded in the rotating direction by a spring so that it functions to reduce backlash between gear teeth and consequent rattling noise when the No. 1 reverse gear meshes with the reverse drive gear.