Manual Transmission/Transaxle: Testing and Inspection

Whenever the clutch pedal is depressed to shift into Reverse, the mainshaft continues to rotate because of its inertia. The resulting speed difference between mainshaft and reverse idler gear produces gear noise. The reverse gear noise reduction system employs a cam plate which was added to the reverse shift holder. When shifting into Reverse, the 5th/reverse shift piece-connected to the shift lever-rotates the cam plate. This causes the 5th synchro set to stop the rotating mainshaft. As there is no speed difference between mainshaft and reverse idler gear, there will be less gear noise.

NOTE: This system is not a fully-synchronized gear noise reduction system. Therefore, you may hear gear noise when

(1) you shift into Reverse with the car not yet completely stopped.
(2) you shift quickly into Reverse during fast idling.