Does the Super Lock LSD for ER34 also fit the S15 Silvia?

Yes. OS Giken lists the Super Lock LSD for ER34 and S15 cars, part number NS062-HA, for both the RB25DET Skyline and the SR20DET Silvia, which use the same rear differential size. It is listed for manual cars in both cases.

Is it good for drifting?

Yes. A clutch-type rear differential locks both rear wheels under power, which is what makes a slide easy to start, hold and link. The ER34 and S15 are both popular drift platforms, and OS Giken can retune the unit for a more aggressive setting if a driver wants it.

Does it fit the R34 GT-R?

No. The BNR34 GT-R uses the RB26DETT and the ATTESA all-wheel-drive system with a different rear differential. This unit is for the rear-drive ER34 Skyline and the S15 Silvia only, so GT-R owners need a different OS Giken part. Ask before ordering.

How does it compare with the factory unit?

Viscous and open rear differentials let the inside tire spin before any locking occurs, and viscous units fade with heat. The OS Giken clutch-type unit locks with torque, so drive is immediate and stays consistent through a long track or drift session.

Will it be harsh for daily driving?

OS Giken sets the Super Lock with a low preload that still reaches full lock progressively, and its Japanese catalogue rates the design among the quietest LSDs in town. Some chatter in very tight parking turns is normal with any clutch-type differential.

Description

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Description

OS Giken Super Lock LSD for ER34 Nissan Skyline and S15 Silvia

OS Giken’s Super Lock LSD for ER34 Nissan Skyline and S15 Silvia covers two turbocharged rear-drive Nissans from the late 1990s, the RB25DET Skyline GT-t and the SR20DET Silvia Spec-R, which share this rear differential. Both are mainstays of drift and grip events, and both left the factory with a viscous or open rear unit that lets the inside tire spin once the car is sideways or loaded mid-corner. OS Giken’s patented pressure ring locks progressively as torque builds, so slides are easier to start and hold and grip-car exits are stronger. For an ER34 or S15 that is driven hard, it is the core drivetrain part.

Design and Performance

The friction plates sit on splines that pass through the side gears, so OS Giken fits up to twice as many as competing designs. That plate area permits a modest street preload with smooth, progressive lock under power. Gears are raw-forged and chemically heat treated, and the case is machined from a single billet.

Features

Clutch-type rear differential shared by the ER34 and S15
Progressive lock from the patented OS Giken pressure ring
Up to twice the friction plates of competing designs
Suited to both drift and grip setups
Billet case and raw-forged gears
Retunable for initial torque, lock timing and ramp angle

Applications

Nissan Silvia: S15 | 1999-2002 | 2.0L SR20DET
Nissan Skyline: ER34 | 1998-2001 | 2.5L RB25DET

Notes

The Super Lock LSD for ER34 and S15 cars is listed for manual-transmission cars
Both cars were sold new in Japan; fitment follows the chassis and engine codes in Applications
Installation labor is not included

Frequently Asked Questions

Does the Super Lock LSD for ER34 also fit the S15 Silvia? Yes. OS Giken lists the Super Lock LSD for ER34 and S15 cars, part number NS062-HA, for both the RB25DET Skyline and the SR20DET Silvia, which use the same rear differential size. It is listed for manual cars in both cases.
Is it good for drifting? Yes. A clutch-type rear differential locks both rear wheels under power, which is what makes a slide easy to start, hold and link. The ER34 and S15 are both popular drift platforms, and OS Giken can retune the unit for a more aggressive setting if a driver wants it.
Does it fit the R34 GT-R? No. The BNR34 GT-R uses the RB26DETT and the ATTESA all-wheel-drive system with a different rear differential. This unit is for the rear-drive ER34 Skyline and the S15 Silvia only, so GT-R owners need a different OS Giken part. Ask before ordering.
How does it compare with the factory unit? Viscous and open rear differentials let the inside tire spin before any locking occurs, and viscous units fade with heat. The OS Giken clutch-type unit locks with torque, so drive is immediate and stays consistent through a long track or drift session.
Will it be harsh for daily driving? OS Giken sets the Super Lock with a low preload that still reaches full lock progressively, and its Japanese catalogue rates the design among the quietest LSDs in town. Some chatter in very tight parking turns is normal with any clutch-type differential.

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 Super Lock LSD for ER34 Nissan Skyline and S15 Silvia [NS062-HA]

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OS Giken Super Lock LSD for ER34 Nissan Skyline and S15 Silvia

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews