Nissan Fairlady/300ZX Z32 Rear Final Drive Side Bearing Shim 2.50mm (Twin Turbo)

Side-bearing preload on a Z32 R200 is set with selective shims, not guesswork. The Genuine Nissan Rear Final Drive Side Bearing Shim (part number 38453-40P10) is the 2.50 mm adjuster used on twin-turbo Fairlady Z and 300ZX final drives.

This shim sits behind the side bearing in the R200 case. Two are typically required, one per side, and thickness must be chosen from measurement—not mixed with a 2.00 mm or other select size. It is specified for twin-turbo Z32 applications that use the R200 rear differential. USDM 1990–1996 300ZX TT and JDM Fairlady Z TT cars that share that case are the intended fit.

Reuse of a crushed or unmarked shim throws backlash and bearing load off. Fit this 2.50 mm piece only after the case is measured during a rebuild or bearing service. At Terra Firma Automotive, we supply this genuine Nissan Z32 twin-turbo side bearing shim so Fairlady and 300ZX owners can set R200 preload with the correct OEM thickness. Choose Terra Firma Automotive for authentic Nissan differential hardware built for the Z32.

 

• Genuine Nissan rear final drive side bearing shim
• Part Number: 38453-40P10
• Thickness: 2.50 mm
• Description: shim-adjust, side bearing
• Quantity required: 2
• USDM 300ZX 1990–1996 TT
• JDM Fairlady Z TT
  
• Sets side-bearing preload and backlash
• Direct OEM replacement
• Available from Terra Firma Automotive