Genuine Nissan 370Z/G37 6-Speed Manual Transmission | OEM VQ37VHR RWD Gearbox | 2009-2020 370Z & 2008-2013 G37 | FS6R31A

This is the genuine Nissan FS6R31A 6-speed manual gearbox fitted to every RWD 2009-2020 370Z and 2008-2013 G37 V36, and it’s the factory VQ37VHR transmission with the updated bellhousing, input shaft, and internal revisions Nissan made for the HR/VHR platform, so it’s stronger and smoother than the DE CD009 while keeping the same proven gear strength and aftermarket support, and it bolts directly to any VQ35HR or VQ37VHR RWD engine with the correct clutch, flywheel, and driveshaft, and the case uses an integrated bellhousing design specific to the HR/VHR crank bolt pattern and starter location, which is different from the earlier DE CD009, so this is the direct OEM replacement if you blew your 370Z or G37 6MT, and the gear ratios are dialed for the VQ37 with a 3.794 1st, 2.324 2nd, 1.624 3rd, 1.271 4th, 1.000 5th, and 0.794 6th, giving aggressive acceleration through 1-4 and a usable 6th for highway cruise with the stock 3.692 VLSD, and Nissan revised the synchros on this VHR version to handle the 7500rpm redline and faster shift speeds, so it doesn’t suffer the 3rd gear grind that early DE boxes had, and the input shaft, countershaft, and mainshaft are all heat-treated for the extra torque of the VQ37, and real-world use shows these hold 550-650whp reliably with a good clutch, solid mounts, and clean fluid, and guys running turbo VHR setups push them past 700whp with trans coolers and careful shifting, and the shifter location is 350mm from the bellhousing face which puts the knob perfect in the Z34 and V36 chassis with the OEM shift linkage, and it uses the standard 24-spline output so your stock driveshaft or any 370Z/G37 1-piece plugs right in, and the slave cylinder is internal concentric style mounted inside the bellhousing, so you’ll reuse or replace your CSC when you install, and the speed sensor is in the tail housing and plugs into the 370Z/G37 harness with no wiring changes, and this gearbox is also popular for HR swaps into 350Z/G35 because it’s stronger than adapting a CD009 and gives correct fitment with HR oil pans and headers, and because it’s genuine Nissan it has the correct spline engagement, bearing preloads, and case tolerances that reman or unknown-condition used units often miss, and that matters when you’re spinning to 7500rpm on track or doing clutch kicks in drift, and every unit comes sealed from Nissan with the correct VHR bellhousing, so you’re not piecing together a CD009 with a JK bellhousing conversion, and if your 370Z/G37 6MT is grinding, popping out of gear, or making bearing noise, this is the exact replacement that restores factory shift feel, strength, and reliability without adapter plates or guesswork, and it’s also the starting point for big-power VHR builds that don’t want to jump to a sequential yet, because the FS6R31A VHR box is the strongest manual Nissan put behind the VQ from the factory.