Identification of 3rd/4th gear synchronizer hub

WARNING: This page does not describe the selected car, but rather 21 other vehicles, including the 2002 Volkswagen Cabrio, 2001 Volkswagen Cabrio, 2000 Volkswagen Cabrio, 1999 Volkswagen Jetta, and 1999 Volkswagen Golf. However, it is still accessible from the selected car via links, so may be relevant.

The 3rd/4th gear synchronizer hub is identified in one of two ways:

Continuous circular groove (arrow -A-) at center (4th gear side)
Axial groove on tips of spline teeth (arrow -B-)

Fig 1: Identifying 3rd/4th Gear Synchronizer Hub

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