TRANSMISSION AND TORQUE CONVERTER 5540F/YB5515 SERVICE MANUAL
7-8 Published 10-21-2010, Control# 198-04
As the axial load on the synchro hub increases, the split
energizer pin “collapses” and the conical faces of the
blocking pin and synchro hub hole come into contact, as
shown in Figure 7-7.
Further increases in the axial loads increases the frictional
grip of the synchro ring and the synchro cup, causing the
shaft and gear speeds to synchronize.
As the speeds are synchronized the radial load on the
blocker pin and synchro hub is reduced. This allows the
synchro hub to slide freely along the blocker pin and engage
its dog teeth with second gear, as shown in Figure 7-8.
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