Does a stock R35 need the Super Lock LSD for R35 cars?

Not usually. The factory rear differential suits standard power. The Super Lock LSD for R35 cars is aimed at modified GT-Rs, where higher torque overwhelms the factory unit on launches and hard exits, and where the extra plate area and retunable setting of the OS Giken unit pay off.

Is it good for drag racing?

Yes. On a high-power R35 the clutch-type Super Lock keeps both rear tires driving as torque rises off the line, which helps straight, repeatable launches. OS Giken can raise initial torque for drag use and fit TCD spec discs for oil cooling over repeated passes.

What is the difference from the TCD version?

The TCD version, part number NS251-HC, uses friction discs with oil holes and channels, which OS Giken says gives smoother and quieter operation. It costs more. The Super Lock suits a GT-R used hard on track or strip; the TCD suits a car driven mostly on the road.

Does installation require removing the transaxle?

Yes. The rear differential sits inside the GR6 transaxle, so it has to come out. That is work for a GT-R specialist, and it is a sensible time to inspect clutch packs and other transaxle parts on a high-power car.

Can the setting be changed later?

Yes. OS Giken rebuilds and retunes Super Lock units in-house, changing initial torque, lock timing and ramp angles. As an R35 build gains power or changes use, the differential can be reset to match rather than replaced. That protects the investment.

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Description

OS Giken Rear Super Lock LSD for R35 Nissan GT-R

OS Giken’s Rear Super Lock LSD for R35 Nissan GT-R replaces the mechanical differential inside the GR6 rear transaxle, the part that has to put a tuned VR38DETT’s torque down through the rear tires. The factory unit works well at stock power, but built R35s now make far more, and on a drag launch or a hard circuit exit the inside rear starts to spin before the all-wheel-drive system can help. OS Giken’s Super Lock carries up to twice the friction plates of competing designs and locks progressively through its patented pressure ring. It suits a modified GT-R that sees the drag strip or the track; a stock car is well served by the factory unit.

Design and Performance

The friction plates run on splines through the side gears, which is how OS Giken fits so much plate area into the case. That clamping area holds high torque while a modest preload keeps the car civil in traffic. The case is machined from a single billet and every gear is raw-forged and chemically heat treated.

Features

Clutch-type differential for the GR6 rear transaxle
Up to twice the friction plates of competing designs for high-torque builds
Patented pressure ring for progressive lock as torque rises
Modest preload for road manners
Billet case and raw-forged gears
Retunable for drag, circuit or road use

Applications

Nissan GT-R: R35 | 2009-2024 | 3.8L VR38DETT, GR6 dual-clutch transaxle

Notes

The Super Lock LSD for R35 cars is also available as a TCD version, part number NS251-HC
Fitting requires removing the rear transaxle; installation labor is not included

Frequently Asked Questions

Does a stock R35 need the Super Lock LSD for R35 cars? Not usually. The factory rear differential suits standard power. The Super Lock LSD for R35 cars is aimed at modified GT-Rs, where higher torque overwhelms the factory unit on launches and hard exits, and where the extra plate area and retunable setting of the OS Giken unit pay off.
Is it good for drag racing? Yes. On a high-power R35 the clutch-type Super Lock keeps both rear tires driving as torque rises off the line, which helps straight, repeatable launches. OS Giken can raise initial torque for drag use and fit TCD spec discs for oil cooling over repeated passes.
What is the difference from the TCD version? The TCD version, part number NS251-HC, uses friction discs with oil holes and channels, which OS Giken says gives smoother and quieter operation. It costs more. The Super Lock suits a GT-R used hard on track or strip; the TCD suits a car driven mostly on the road.
Does installation require removing the transaxle? Yes. The rear differential sits inside the GR6 transaxle, so it has to come out. That is work for a GT-R specialist, and it is a sensible time to inspect clutch packs and other transaxle parts on a high-power car.
Can the setting be changed later? Yes. OS Giken rebuilds and retunes Super Lock units in-house, changing initial torque, lock timing and ramp angles. As an R35 build gains power or changes use, the differential can be reset to match rather than replaced. That protects the investment.

About OS Giken

OS Giken was founded in Okayama, Japan in 1973 by Masaharu Okazaki. It built the TC16 and TC24-B1 DOHC cylinder heads for Nissan L-series engines, began making multi-plate racing clutches in 1982 and started supplying OEM limited-slip differentials in 1983. Development of the Super Lock LSD began in 1997, and of the OS-88 sequential gearbox for the Skyline GT-R in 1998.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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OS Giken Rear Super Lock LSD for R35 Nissan GT-R [NS251-HA]

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OS Giken Rear Super Lock LSD for R35 Nissan GT-R

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews