Suzuki Samurai Low Speed Syncro, otherwise knows at the "Large" syncro from Petroworks.
There are 2 used in the transmission, but they usually do not have to be replaced.
These are Suzuki OEM Syncros
which accounts for the higher price. We have found over the years that
the cheaper Chinese made aftermarket syncros are in fact sized wrong and
creates a problem during shifting that most people assume is a
transmission rebuild issue.