NISSAN 32607-VC20A Synchronizer Ring (4th Gear)

This genuine NISSAN (OEM: 32607-VC20A) 4th gear synchronizer ring (baulk ring) is a premium-quality, precision-engineered component specifically designed to ensure the reliable and smooth operation of manual transmissions. The synchronizer ring plays a crucial role in equalizing rotational speed differences between gears, preventing gear damage.

Operating Principle and Function

During manual gear shifting, the tapered friction surface of the synchronizer ring contacts the gear cone. Through the resulting friction, the rotational speeds of the moving components are matched (synchronized) before the shift sleeve fully engages with the gear. This ensures quiet, grind-free, and effortless shifting into 4th gear.

Technical Features and Specifications

• Manufacturer: NISSAN (Genuine OEM part)
• OEM Part Number: 32607-VC20A
• Part Designation: Synchronizer Ring (4th Gear) / Baulk Ring
• Material Composition: Special high-wear-resistant brass or bronze alloy featuring an excellent friction coefficient and high thermal conductivity.
• Installation Location: Manual transmission internal assembly, at the 4th gear.

Typical Signs of Wear or Failure

Synchronizer rings are standard wear items that degrade over time or as a result of improper shifting habits. The most common symptoms of failure include:

• Grinding or metallic noise when engaging 4th gear.
• Increased resistance or catching when moving the shift lever into 4th gear.
• Transmission unexpectedly popping out of 4th gear while driving.
• Presence of fine metal shavings or bronze particles during transmission fluid replacement.

Genuine NISSAN parts ensure a perfect fit, adherence to strict factory tolerances, and long service life, restoring the transmission's original, precise operation.