Gear Components: Inspection: Synchronizers

WARNING: This page is about a different car, the 2013 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

If the contact surface on coupling sleeve, synchronizer hub, and shifting insert has damage or abrasion, replace the components.
Coupling sleeve and synchronizer hub shall move smoothly.

Fig 1: Checking Coupling Sleeve And Synchronizer Hub
Courtesy of NISSAN NORTH AMERICA, INC.
If the cam surface on baulk ring or contact surface on insert has damage or excessive wear, replace with a new one.
If spread spring damaged, replace with a new one.

Fig 2: Inspecting Baulk Ring Cam Surface For Excessive Wear & Damage
Courtesy of NISSAN NORTH AMERICA, INC.
Reverse Synchronizer
Push baulk ring on the cone, and measure the clearance between baulk ring and cone. If the measurement is below limit, replace it with a new one.

Clearance

Standard value Refer to "BAULK RING CLEARANCE "

Limit value Refer to "BAULK RING CLEARANCE "

Fig 3: Measuring Clearance Between Baulk Ring And Cone
Courtesy of NISSAN NORTH AMERICA, INC.