Transmission gear synchronizer blocker ring formed of a thermoplastic material

A transmission gear synchronizer comprising:

• a sliding sleeve having an inner surface defining a plurality of sleeve teeth extending radially inward from the inner surface of the sliding sleeve towards a transmission shaft, each sleeve tooth of the plurality of sleeve teeth having a tip, the tip defined by a first surface disposed at a first angle relative to a longitudinal axis of a transmission shaft and a second surface disposed at a second angle relative to the longitudinal axis of the transmission shaft;
• a hub having a plurality of hub gear teeth extending radially outward from a root diameter of the hub, the hub configured to be received within the sliding sleeve;
• and
• a blocker ring formed from a thermoplastic material and disposed adjacent the hub, the blocker ring having:
• a plurality of molded clutch teeth extending radially outward from a root diameter of the blocker ring, each molded clutch tooth of the plurality of molded clutch teeth having an end surface defined by a third surface disposed at a third angle relative to the longitudinal axis of the transmission shaft and a fourth surface disposed at a fourth angle relative to the longitudinal axis of the transmission shaft, the second surface is configured to engage the third surface during a transmission upshift event and the first surface is configured to engage the fourth surface of an adjacent molded clutch tooth of the blocker ring during a transmission downshift event, and
• an inner surface defining a plurality of molded grooves extending axially along the inner surface of the blocker ring, each molded groove of the plurality of molded grooves is disposed substantially parallel to a longitudinal axis of the blocker ring.

A transmission gear synchronizer blocker ring comprising:

• a first end region configured to be disposed proximate an engagement ring, the first end region having a plurality of molded clutch teeth disposed continuously about a circumference of the first end region;
• a second end region configured to be disposed proximate a sleeve assembly;
• and
• a generally cylindrical body extending between the first end region and the second end region, the generally cylindrical body having an outer surface and an inner surface,
• the outer surface having a molded engagement pad extending radially outwardly from the outer surface, wherein the molded engagement pad is configured to mate with a notch of the sleeve assembly, and
• the inner surface having a plurality of molded grooves, each molded groove of the plurality of molded grooves extending in an axial direction along the inner surface, wherein the plurality of molded grooves are configured to engage a cone of an engagement ring during a transmission shift event responsive to a difference in rotational speed between a gear and the sleeve assembly.