How do I know if I need the Super Lock LSD for Early AE86 cars?

OS Giken splits the AE86 by build date. Cars built from May 1983 to September 1985 take this Super Lock LSD for Early AE86 cars, part number TY311-HA3. Cars built from October 1985 to April 1987 take TY311-HA4. The build date is on the vehicle identification plate.

Is it good for drifting an AE86?

Yes. A clutch-type rear differential locks both rear wheels under power, which is what lets a car start, hold and link a slide. With the factory open differential the inside rear spins instead. OS Giken can retune initial torque and lock timing for a more aggressive drift setting.

Will it handle a 4A-GE with more power?

The Super Lock is built with up to twice the friction plates of competing designs, giving it a good margin over a stock or mildly modified 4A-GE. For heavily modified engines OS Giken can raise initial torque to suit the build.

Does it suit a road-driven classic?

Yes. 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. A road-driven AE86 keeps easy manners until it is driven hard.

Can it be rebuilt in future?

Yes. The friction plates are a wear part, and OS Giken rebuilds and retunes Super Lock units in-house. That matters on a classic that may be kept for decades, because the differential can be refreshed rather than replaced. Parts support continues.

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Description

OS Giken Super Lock LSD for Early AE86 Toyota Corolla 1983-1985 Manual

OS Giken’s Super Lock LSD for Early AE86 Toyota Corolla 1983-1985 Manual is the zenki-specification unit for Hachirokus built from May 1983 to September 1985, the earlier of the two production windows OS Giken lists separately. The AE86 is closely tied to the early days of drifting, and its light rear-drive layout with a high-revving 4A-GE needs a locking rear differential to slide predictably; with the factory open unit the inside rear simply spins. OS Giken’s patented pressure ring locks progressively as the throttle opens. It suits an early AE86 being built for drift, grip events or spirited road driving.

Fitment Notes

OS Giken lists the AE86 by build date rather than by model year: this unit covers cars built from May 1983 to September 1985, and a separate part covers October 1985 to April 1987. Check the build date on the car before ordering, especially on imported Japanese cars where model-year conventions differ.

Features

Zenki-specification unit for early AE86 production
Clutch-type rear differential for the 4A-GE car
Patented OS Giken pressure ring for progressive lock
Up to twice the friction plates of competing designs
Light preload for a road-registered classic
Retunable for drift or grip use

Applications

Toyota Corolla: AE86 | 1983-1985 | 1.6L 4A-GE, manual

Notes

This Super Lock LSD for Early AE86 cars covers May 1983 to September 1985 production; later cars take part number TY311-HA4
Listed for manual-transmission cars only
Installation labor is not included

Frequently Asked Questions

How do I know if I need the Super Lock LSD for Early AE86 cars? OS Giken splits the AE86 by build date. Cars built from May 1983 to September 1985 take this Super Lock LSD for Early AE86 cars, part number TY311-HA3. Cars built from October 1985 to April 1987 take TY311-HA4. The build date is on the vehicle identification plate.
Is it good for drifting an AE86? Yes. A clutch-type rear differential locks both rear wheels under power, which is what lets a car start, hold and link a slide. With the factory open differential the inside rear spins instead. OS Giken can retune initial torque and lock timing for a more aggressive drift setting.
Will it handle a 4A-GE with more power? The Super Lock is built with up to twice the friction plates of competing designs, giving it a good margin over a stock or mildly modified 4A-GE. For heavily modified engines OS Giken can raise initial torque to suit the build.
Does it suit a road-driven classic? Yes. 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. A road-driven AE86 keeps easy manners until it is driven hard.
Can it be rebuilt in future? Yes. The friction plates are a wear part, and OS Giken rebuilds and retunes Super Lock units in-house. That matters on a classic that may be kept for decades, because the differential can be refreshed rather than replaced. Parts support continues.

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 Early AE86 Toyota Corolla 1983-1985 Manual [TY311-HA3]

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OS Giken Super Lock LSD for Early AE86 Toyota Corolla 1983-1985 Manual

Fitment Notes

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

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