Terra Firma Automotive supplies genuine Nissan differential adjustment components essential for a professional R200 differential rebuild on twin-turbo Z32s. This 2.91 mm pinion adjust washer is the exact OEM selective shim used to set precise pinion depth. Manufactured to Nissan’s strict thickness tolerance, it allows accurate positioning of the pinion gear relative to the ring gear for optimal tooth contact pattern, backlash, and preload.
Correct pinion depth is critical on high-torque VG30DETT models. Even slight variations can cause whining, humming, premature wear, or gear failure under boost. This authentic 2.91 mm washer gives builders one of the key selective options needed to achieve factory-spec gear mesh during assembly, resulting in quiet operation and maximum differential longevity.
At Terra Firma Automotive we stock the full range of these selective pinion shims because they are vital for a quiet, durable, and properly set up differential. Whether you are rebuilding a high-horsepower twin-turbo rear end, refreshing bearings and seals, or performing a complete differential overhaul on your 1989–1996 Fairlady Z or 1990–1996 300ZX, this 2.91 mm pinion adjust washer is an essential piece for achieving precise gear geometry and reliable performance.
- Genuine Nissan OEM pinion depth adjustment washer (Part Number 38154-40P16)
- Precise thickness: 2.91 mm
- Selective fit for VG30DETT Twin Turbo R200 differential
- Critical for correct pinion depth and gear contact pattern
- Helps eliminate whine and extend ring & pinion life
- Essential during differential rebuilds or bearing replacement
- Sold individually (measure and 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)
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