Does the Super Lock LSD for Late AE86 cars fit a US Corolla GT-S?

Yes, for cars built within the listed window. Turn 14 lists the Super Lock LSD for Late AE86 cars, part number TY311-HA4, for the 1985-1987 Corolla Sport GT-S. Check the build date on the identification plate, since cars built before October 1985 take the earlier unit, TY311-HA3.

Why does OS Giken make two AE86 versions?

Toyota changed the AE86 during production, and OS Giken lists separate differentials for cars built before and after October 1985. Ordering by build date rather than model year avoids receiving a unit for the wrong rear end. It is a simple check.

Is it a good drift differential?

Yes. Locking both rear wheels under power is what makes a car slide predictably, and the factory open differential cannot do it. The Super Lock makes slides easier to start and link, and OS Giken can retune it for a more aggressive feel.

How does it drive on the street?

OS Giken sets the Super Lock with a light preload that still reaches full lock progressively, and its Japanese catalogue rates the design among the quietest LSDs in town. Expect normal manners in traffic and a clear difference when driving hard.

Yes. OS Giken rebuilds and retunes Super Lock units in-house, replacing the friction plates and adjusting initial torque and lock timing. On a car that is likely to be kept for many years, that makes the differential a long-term part rather than a consumable.

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Description

OS Giken Super Lock LSD for Late AE86 Toyota Corolla 1985-1987 Manual

OS Giken’s Super Lock LSD for Late AE86 Toyota Corolla 1985-1987 Manual is the kouki-specification unit for Hachirokus built from October 1985 to April 1987, which takes in the US Corolla GT-S of those years. A late AE86 still weighs well under a ton and a half, and with the factory open differential its 4A-GE spins the inside rear the moment the car is loaded or sideways. OS Giken’s patented pressure ring locks both rear wheels progressively under power, so slides are easier to hold and grip-car exits are stronger. Pick it for a kouki AE86 or a US GT-S being built for drift, autocross or track days.

Fitment Notes

OS Giken separates the AE86 by build date. This unit covers cars built from October 1985 to April 1987; earlier cars take the zenki unit. The build date is on the vehicle identification plate, and it is worth checking on imported cars, where model-year conventions differ from US practice.

Features

Kouki-specification unit for late AE86 production
Covers the US Corolla GT-S of the same build period
Clutch-type rear differential for the 4A-GE car
Patented pressure ring for progressive lock
Up to twice the friction plates of competing designs
Retunable for drift or grip use

Applications

Toyota Corolla: AE86 | 1985-1987 | 1.6L 4A-GE, manual

Notes

This Super Lock LSD for Late AE86 cars covers October 1985 to April 1987 production; earlier cars take the OS Giken Super Lock LSD for Early AE86 Toyota Corolla 1983-1985 Manual
Listed for manual-transmission cars only
Installation labor is not included

Frequently Asked Questions

Does the Super Lock LSD for Late AE86 cars fit a US Corolla GT-S? Yes, for cars built within the listed window. Turn 14 lists the Super Lock LSD for Late AE86 cars, part number TY311-HA4, for the 1985-1987 Corolla Sport GT-S. Check the build date on the identification plate, since cars built before October 1985 take the earlier unit, TY311-HA3.
Why does OS Giken make two AE86 versions? Toyota changed the AE86 during production, and OS Giken lists separate differentials for cars built before and after October 1985. Ordering by build date rather than model year avoids receiving a unit for the wrong rear end. It is a simple check.
Is it a good drift differential? Yes. Locking both rear wheels under power is what makes a car slide predictably, and the factory open differential cannot do it. The Super Lock makes slides easier to start and link, and OS Giken can retune it for a more aggressive feel.
How does it drive on the street? OS Giken sets the Super Lock with a light preload that still reaches full lock progressively, and its Japanese catalogue rates the design among the quietest LSDs in town. Expect normal manners in traffic and a clear difference when driving hard.
Can it be rebuilt? Yes. OS Giken rebuilds and retunes Super Lock units in-house, replacing the friction plates and adjusting initial torque and lock timing. On a car that is likely to be kept for many years, that makes the differential a long-term part rather than a consumable.

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 Late AE86 Toyota Corolla 1985-1987 Manual [TY311-HA4]

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OS Giken Super Lock LSD for Late AE86 Toyota Corolla 1985-1987 Manual

Fitment Notes

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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