Terra Firma Automotive supplies genuine Nissan differential adjustment shims that allow precise setup of the R200 limited-slip differential on twin-turbo Z32s. This 2.95 mm pinion adjust washer is the exact OEM selective spacer used to control the depth of the pinion gear relative to the ring gear. Precision-ground to Nissan’s exact thickness tolerance, it is a critical component for achieving the ideal gear mesh, contact pattern, and backlash required for smooth, quiet operation under the high torque output of the VG30DETT engine.
Proper pinion depth is essential when rebuilding a twin-turbo differential. Incorrect clearance can cause persistent gear whine, humming under acceleration, vibration, or premature wear of the ring and pinion set. This authentic 2.95 mm washer provides one of the thicker options in Nissan’s selective range, giving builders the ability to fine-tune the setup for optimal performance and long-term durability.
At Terra Firma Automotive we maintain the complete selection of these pinion depth shims because they are vital for a professional and reliable differential rebuild. Whether you are overhauling a high-horsepower twin-turbo rear end, replacing bearings and seals, or performing a full differential restoration on your 1989–1996 Fairlady Z or 1990–1996 300ZX, this 2.95 mm pinion adjust washer helps achieve factory-correct gear geometry and quiet power delivery.
- Genuine Nissan OEM pinion depth adjustment washer (Part Number 38154-40P18)
- Precise thickness: 2.95 mm
- Selective fit for VG30DETT Twin Turbo R200 differential
- Critical for proper gear contact pattern and backlash
- Helps eliminate whine and extend ring & pinion life
- Essential during differential rebuilds or bearing service
- Sold individually (measure existing setup to select correct thickness)
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