Synchronizers

Question 1

Common types of synchronizers

Answer 1

Blocker ring/come, disc and plate, plain

These are the common types of synchronizers used in manual transmissions.

Question 2

Synchronizer hub and sleeve

Answer 2

Splined inner diameter and grooved outer diameter

The synchronizer hub and sleeve have specific features for proper operation.

Question 3

Keys

Answer 3

They fit into groves on the hub. Slide back and forth freely. Hold the insert in the synchronizer sleeve. They are also called inserts or dogs.

Keys are essential components in the synchronizer assembly.

Question 4

Double cone synchronizer

Answer 4

Has friction material on both surface sides. Is a smaller size synchronizer.

The double cone synchronizer has specific characteristics for efficient operation.

Question 5

Triple cone synchronizer

Answer 5

Contains three surfaces of friction materials. Provides improved heat transfer. Allows shifting at higher RPM.

The triple cone synchronizer offers enhanced performance in manual transmissions.

Question 6

Centrifugal block out synchronizer

Answer 6

Similar internal components as a typical block synchronizer. Added weights and springs to lock out the gears.

The centrifugal block out synchronizer has additional features for specific applications.

Question 7

Operation

Answer 7

Centrifugal weights lock into the hub. This prevents shifting when vehicle speed is too high. This reduces transmission damage from shifting.

Understanding the operation of synchronizers is crucial for proper transmission function.