Part of Lesson Plan: **Synchronizers (updated) by Beau Sunahara

Activity Overview / Details

The teacher will lecture explaining how a transmission use synchronizers to shift gears while the vehicle is still moving.

The teacher will show the internal ribs or teeth of the blocking rings and explain their importance in slowing down the speed of the cone on the various gears.

The teacher will explain how hard shifting can occur from worn synchronizers if it has already been determined that the clutch is not at fault.  During service or when checking manual transmission fluid, the technician will notice brass-colored debris in the fluid.  This is caused by blocking rings that are starting to wear.

The teacher will explain how the dog teeth of the gear are used to secure the gears to the hub of the  given synchronizer by having the sleeve slide over both parts locking them together.

The teacher will demonstrate with a torn-down manual transmission how the hubs are locked to the output shaft, while all the gears can freely rotate on the output shaft.

The teacher will pass out parts as they explain their specific operation in the synchronizer.

The teacher will ask for questions at the end of the lecture to clarify explanations.

Students will take Cornell-style notes during the lecture.