Terra Firma Automotive supplies genuine Nissan transmission synchro rings that restore the smooth, precise shifting character your Z32 manual gearbox was built with. This late-style 4th gear baulk synchro ring is the exact OEM friction cone designed for later production Z32 transmissions. It features Nissan’s updated friction material and optimized cone angle to quickly and quietly match shaft speeds when shifting into fourth gear, delivering clean engagement even during enthusiastic driving or highway passing maneuvers.
Fourth gear synchros in the Z32 handle frequent high-speed shifts and can wear noticeably over time, resulting in hesitation, grinding, or a notchy feel that takes the enjoyment out of driving. This authentic late-version replacement returns the factory-smooth transition and positive mechanical feedback while reducing stress on the gear teeth, synchronizer hub, and shift fork. Its upgraded friction surface provides stronger bite and longer service life compared to earlier designs.
At Terra Firma Automotive we focus on the correct factory internals that make rebuilt transmissions feel right again. Whether you’re performing a full gearbox overhaul on your twin-turbo, refreshing worn synchros on a naturally aspirated model, or doing a complete transmission service on your 1989–1996 Fairlady Z or 1990–1996 300ZX, this late-style 4th gear baulk ring is a vital upgrade for regaining crisp, confidence-inspiring shifts.
- Fits 32604+E Location
- Genuine Nissan OEM late-style 4th gear baulk synchro ring (Part Number 32604-40P61)
- Direct fit for all Z32 manual transmissions
- Updated friction material and cone geometry for improved synchronization
- Eliminates grinding and hesitation when selecting 4th gear
- Critical wear item recommended during synchro or full transmission rebuilds
- Helps protect 4th gear, hub, and shift fork from accelerated wear
- Sold individually (best replaced together with matching 1st/2nd/3rd rings)
- USDM 300ZX (Z32): 1990–1996 (VG30DE & VG30DETT – NA or TT)
- JDM Fairlady Z (Z32): 1989–1996 (VG30DE & VG30DETT – NA or TT)
- Engine Compatibility: Fits all VG30DE and VG30DETT engines with manual transmission
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