Nissan Fairlady/300ZX Z32 Rear End Drive Pinion Adjust Washer 2.97mm (Twin Turbo)

Terra Firma Automotive supplies genuine Nissan differential adjustment shims that enable precise pinion depth setup on the R200 limited-slip differential in twin-turbo Z32s. This 2.97 mm pinion adjust washer is the exact OEM selective spacer used to fine-tune the position of the pinion gear relative to the ring gear. Ground to Nissan’s exact thickness specification, it is one of the thicker options available, allowing experienced builders to achieve the ideal gear contact pattern, backlash, and preload for smooth and quiet operation under the high torque of the VG30DETT.

Getting pinion depth correct is one of the most critical steps when rebuilding a twin-turbo differential. An incorrect thickness can cause persistent gear whine, humming under load, vibration, or accelerated wear. This authentic 2.97 mm washer gives you the necessary precision to dial in factory-spec tolerances during assembly.

At Terra Firma Automotive we stock the full range of these selective pinion shims because they are vital for a professional and long-lasting differential rebuild. Whether you are overhauling a high-horsepower twin-turbo rear end, replacing bearings and seals, or performing a complete differential restoration on your 1989–1996 Fairlady Z or 1990–1996 300ZX, this 2.97 mm pinion adjust washer helps achieve optimal gear geometry and reliable performance.

• Genuine Nissan OEM pinion depth adjustment washer (Part Number 38154-40P19)
• Precise thickness: 2.97 mm
• Selective fit for VG30DETT Twin Turbo R200 differential
• Critical for proper gear contact pattern and backlash
• Helps eliminate whine and maximize ring & pinion longevity
• Essential during differential rebuilds or bearing service
• Sold individually (measure existing setup to select correct thickness)
• USDM 300ZX (Z32): 1990–1996 (VG30DETT – Twin Turbo only)
• JDM Fairlady Z (Z32): 1989–1996 (VG30DETT – Twin Turbo only)
• Engine Compatibility: Fits VG30DETT engines (Twin-Turbo only)