Why choose the TCD LSD for R35 cars over the Super Lock?

The TCD LSD for R35 cars uses oil-fed friction discs that OS Giken says move between open and locked more smoothly and quietly, reducing the shock typical of a mechanical LSD. It suits a GT-R driven mostly on the road. The Super Lock, NS251-HA, costs less and suits track and strip cars.

Does TCD give up traction?

No. OS Giken states that TCD keeps the high traction and response speed of the Super Lock. The oil holes and channels change how smoothly the differential engages, not how strongly it locks, so launches and corner exits are unaffected.

Is it suitable for a high-power R35?

Yes. TCD shares the Super Lock construction and plate area, and its oil-fed discs also help with lubrication under load. For very high outputs OS Giken can adjust the cam angle and initial torque to suit the build. Ask before ordering.

Does installation require removing the transaxle?

Yes. The rear differential lives inside the GR6 transaxle, so the transaxle must come out. That is work for a GT-R specialist, who can inspect the clutch packs and other internals at the same time. Budget the labor time accordingly.

Can the cam angle be changed?

Yes. OS Giken notes that the cam angle on TCD units, which sets on-throttle and off-throttle behavior, can be chosen freely, and it rebuilds and retunes its differentials in-house if the car or its use changes later. Ask before ordering.

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Description

OS Giken Rear TCD LSD for R35 Nissan GT-R

OS Giken’s Rear TCD LSD for R35 Nissan GT-R is the oil-fed version of OS Giken’s differential for the GR6 transaxle, and the type OS Giken itself features for the R35 in its Japanese catalogue. A modified GT-R used on the road suffers the clunks and chatter of a hard-working mechanical LSD every time it parks or creeps in traffic, and owners of fast daily drivers notice it. TCD keeps the Super Lock’s pressure ring and traction but feeds oil across the friction discs, so the differential moves between open and locked smoothly. It is the right rear differential for a powerful R35 that still spends most of its time on public roads.

How TCD Differs

TCD keeps the Super Lock mechanism but adds oil holes and channels to the friction discs, so the disc faces stay wet at all times. OS Giken says this lets the differential move smoothly between open and locked states, cutting the noise and shock typical of a mechanical LSD while keeping the Super Lock’s traction and response.

Features

TCD friction discs with oil holes and channels
Smooth, quiet engagement for a daily-driven GT-R
Super Lock pressure ring for traction under high torque
Featured by OS Giken Japan for the R35
Billet case and raw-forged gears
Cam angle adjustable by OS Giken

Applications

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

Notes

The TCD LSD for R35 cars is the quieter alternative to the Super Lock for the same car, part number NS251-HA
Fitting requires removing the rear transaxle; installation labor is not included

Frequently Asked Questions

Why choose the TCD LSD for R35 cars over the Super Lock? The TCD LSD for R35 cars uses oil-fed friction discs that OS Giken says move between open and locked more smoothly and quietly, reducing the shock typical of a mechanical LSD. It suits a GT-R driven mostly on the road. The Super Lock, NS251-HA, costs less and suits track and strip cars.
Does TCD give up traction? No. OS Giken states that TCD keeps the high traction and response speed of the Super Lock. The oil holes and channels change how smoothly the differential engages, not how strongly it locks, so launches and corner exits are unaffected.
Is it suitable for a high-power R35? Yes. TCD shares the Super Lock construction and plate area, and its oil-fed discs also help with lubrication under load. For very high outputs OS Giken can adjust the cam angle and initial torque to suit the build. Ask before ordering.
Does installation require removing the transaxle? Yes. The rear differential lives inside the GR6 transaxle, so the transaxle must come out. That is work for a GT-R specialist, who can inspect the clutch packs and other internals at the same time. Budget the labor time accordingly.
Can the cam angle be changed? Yes. OS Giken notes that the cam angle on TCD units, which sets on-throttle and off-throttle behavior, can be chosen freely, and it rebuilds and retunes its differentials in-house if the car or its use changes later. Ask before ordering.

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

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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 TCD LSD for R35 Nissan GT-R [NS251-HC]

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OS Giken Rear TCD LSD for R35 Nissan GT-R

How TCD Differs

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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