Synchronizer Ring

WARNING: This page is about a different car, the 2005 Dodge Stratus. However, it is still accessible from the selected car via links, so may be relevant.

Check if the clutch gear teeth are damaged or broken.
Check internal surface for damage, wear and broken threads.

Fig 1: Checking Clutch Gear Teeth
Courtesy of DAIMLERCHRYSLER CORP.
Force the synchronizer ring toward the clutch gear and check clearance "A". If "A" is less than the limit, replace the synchronizer ring.
Minimum limit: 0.5 mm (0.020 inch)

Fig 2: Checking Clearance "A"
Courtesy of DAIMLERCHRYSLER CORP.