How do I know whether my Supra has the 8.5-inch or the 9-inch differential?

The six-speed Supra Turbo was built with the larger 9-inch rear differential, while automatic cars, the five-speed and most other JZA80 variants use the 8.5-inch unit. The ring gear size can be confirmed on the car. This Super Lock LSD for JZA80 cars fits the 8.5-inch version.

Will it handle a big-turbo 2JZ?

The Super Lock is built with up to twice the friction plates of competing designs, which gives it the clamping area to hold high torque. For very high outputs OS Giken can retune initial torque and fit TCD spec discs, and a TCD version for these cars is listed separately.

Is the Super Lock LSD for JZA80 cars suitable for drag racing?

Yes. A clutch-type differential locks both rear wheels as torque rises, so both tires drive off the line instead of one spinning. That gives straighter, more consistent launches than the factory unit on a high-power car. It also helps consistency from run to run.

Does it fit the Soarer?

Yes. OS Giken lists part number TY031-HA for the automatic JZZ30 Soarer as well as the 8.5-inch Supra. The Soarer is a Japanese-market car, so fitment follows the chassis code rather than a US model year. Ask Bulletproof Automotive if unsure.

What is the difference from the TCD version?

The TCD version, part number TY031-HC, uses OS Giken TCD spec discs, which OS Giken says improve oil cooling and give even smoother operation. It costs more. The standard Super Lock suits most street and track cars, while the TCD suits heavy, high-power or endurance use.

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Description

OS Giken Super Lock LSD for JZA80 Toyota Supra 8.5in and JZZ30 Soarer Automatic

OS Giken’s Super Lock LSD for JZA80 Toyota Supra 8.5in and JZZ30 Soarer Automatic is the clutch-type differential for the Mk4 Supras built with the smaller 8.5-inch rear end, covering automatic, five-speed and six-speed cars built with that axle, plus the automatic JZZ30 Soarer. Those cars are often the base for big-turbo 2JZ builds, and the factory differential cannot hold onto the torque a modified 2JZ produces once a rear tire unloads. OS Giken’s patented pressure ring locks both rear wheels progressively. Choose it for an 8.5-inch Supra headed for the drag strip, drift events or the track.

Design and Performance

OS Giken threads its friction plates onto splines through the side gears, fitting up to twice as many as competing designs. That plate area lets the unit run a modest preload for the street and still reach full lock under power. The case is billet-machined and every gear is raw-forged and chemically heat treated.

Features

Clutch-type rear differential for 8.5-inch JZA80 axles
Covers the automatic, five-speed and 8.5-inch six-speed Supras
Patented pressure ring for progressive lock on throttle
Up to twice the friction plates of competing designs
Billet case and raw-forged gears
Retunable for big-power 2JZ builds

Applications

Toyota Supra: JZA80 | 1993-1998 | 3.0L 2JZ-GE / 2JZ-GTE, 8.5-inch rear differential
Toyota Soarer: JZZ30 | 1991-2000 | automatic

Notes

The Super Lock LSD for JZA80 cars in this listing is for the 8.5-inch differential; Supra Turbo six-speed cars with the 9-inch differential take part number TY033-HA
A TCD version for the same cars is listed as part number TY031-HC
Installation labor is not included

Frequently Asked Questions

How do I know whether my Supra has the 8.5-inch or the 9-inch differential? The six-speed Supra Turbo was built with the larger 9-inch rear differential, while automatic cars, the five-speed and most other JZA80 variants use the 8.5-inch unit. The ring gear size can be confirmed on the car. This Super Lock LSD for JZA80 cars fits the 8.5-inch version.
Will it handle a big-turbo 2JZ? The Super Lock is built with up to twice the friction plates of competing designs, which gives it the clamping area to hold high torque. For very high outputs OS Giken can retune initial torque and fit TCD spec discs, and a TCD version for these cars is listed separately.
Is the Super Lock LSD for JZA80 cars suitable for drag racing? Yes. A clutch-type differential locks both rear wheels as torque rises, so both tires drive off the line instead of one spinning. That gives straighter, more consistent launches than the factory unit on a high-power car. It also helps consistency from run to run.
Does it fit the Soarer? Yes. OS Giken lists part number TY031-HA for the automatic JZZ30 Soarer as well as the 8.5-inch Supra. The Soarer is a Japanese-market car, so fitment follows the chassis code rather than a US model year. Ask Bulletproof Automotive if unsure.
What is the difference from the TCD version? The TCD version, part number TY031-HC, uses OS Giken TCD spec discs, which OS Giken says improve oil cooling and give even smoother operation. It costs more. The standard Super Lock suits most street and track cars, while the TCD suits heavy, high-power or endurance use.

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 JZA80 Toyota Supra 8.5in and JZZ30 Soarer Automatic [TY031-HA]

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OS Giken Super Lock LSD for JZA80 Toyota Supra 8.5in and JZZ30 Soarer Automatic

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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