Subaru Impreza 2002 Service Manual page 43

Manual Transmission and Differential
2. Triple-Cone Synchronizer
A: CONSTRUCTION
The triple-cone synchronizer has three frictional interfaces - in addition to the two coaxial inter-
faces between the synchronizer cone and the inner and outer balk rings (which are same as those
with a double-cone synchronizer), it has a third frictional interface between the inner surface of
the inner balk ring and the cone on the 2nd driven gear. Thanks to an increased friction force, the
triple-cone type produces larger synchronizing power than a double-cone type synchronizer. The
main components of the triple-cone synchronizer are the outer balk ring, synchronizer cone, inner
balk ring, and 2nd driven gear's cone.
[A] Double-cone synchronizer
[B] Triple-cone synchronizer
(1) 2nd driven gear
(2) Outer balk ring
(3) Synchronizer cone
(4) Inner balk ring
TRIPLE-CONE SYNCHRONIZER
6MT-4
(5) 1st driven gear
(6) Cone surface 1
(7) Cone surface 2
(8) Cone surface 3
NF0599