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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5
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TRIPLE CONE SYNCHRONIZER MECHANISM

Purpose/Function

  • In order to increase the capability of meshing, a carbon coated triple cone synchronizer mechanism is used for the 1st and 2nd gears.

  • A triple cone synchronizer mechanism is used for the 3rd and 4th gears.

  • The triple cone synchronizer mechanism is a compact device capable of heavy duty meshing.

  • The synchro mechanism reduces meshing time and improves operation.

Construction

Structural view

Operation

1. When the hub sleeve moves to the left (in the direction of the arrow), the synchronizer key presses against the synchronizer ring.

2. As the hub sleeve continues moving to the left, the key causes friction between the synchronizer ring, double cone, and inner cone. The synchronizer ring turns only the distance that the key groove gap allows, aligning the teeth of the hub sleeve and the synchronizer ring. As the hub sleeve continues moving, the friction between the cones becomes greater, and the difference between the rotational speeds of the synchronizer ring, inner cone, and double cone (unified with the gear) gradually disappears.

3. The hub sleeve then moves up onto the synchronizer key and engages the synchronizer ring.

4. The hub sleeve then engages the synchro teeth of the gear to complete shifting.

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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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