Synchronizer Sleeve And Hub

Install the synchronizer sleeve on the hub and check that they slide smoothly.
Check that the sleeve is free from damage at its inside front and rear ends.
Check for wear of the hub front end (surface in contact with the fifth speed gear).

Fig 1: Inspecting Synchronizer Sleeve And Hub
Courtesy of KIA MOTORS AMERICA, INC.

CAUTION: Replace the synchronizer hub and sleeve as a set.