Does the Super Lock LSD for C4 Corvettes fit every C4?

OS Giken lists the Super Lock LSD for C4 Corvette and SR Viper cars, part number CH051-HA, for manual-transmission C4 Corvettes from 1986 to 1996, with Turn 14 fitment data covering 1992 to 1996 including the ZR-1. Automatic C4s are not listed for this part, so confirm the transmission before ordering.

Why do a Corvette and a Viper share a differential?

The C4 Corvette and the first-generation Viper use the same size of rear differential, so one OS Giken unit serves both. Fitment is decided by the axle, not the badge, which is why OS Giken lists them together. Check the axle in the car.

Is it strong enough for a V10 Viper?

The Super Lock carries up to twice the friction plates of competing designs, which gives it the clamping area for high torque. OS Giken can raise initial torque or fit TCD spec discs for oil cooling on a modified or heavily tracked car.

What does it change on track?

Both rear tires keep driving as the inside one unloads, so the car exits slow corners with more drive and less wheelspin. In a car with as much torque as a Viper, that also makes power delivery more predictable at the limit.

Can it be serviced later?

Yes. The friction plates wear slowly with use, and OS Giken rebuilds and retunes Super Lock units in-house. For a collectible car that may be kept for decades, that makes the differential a long-term part rather than a consumable. Ask about rebuild timing.

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Description

OS Giken Super Lock LSD for C4 Chevrolet Corvette and SR Dodge Viper Manual

OS Giken’s Super Lock LSD for C4 Chevrolet Corvette and SR Dodge Viper Manual serves two very different American sports cars that happen to share a rear differential size, the manual C4 Corvette and the first-generation SR Viper. Both put big V8 or V10 torque through a short rear axle, and a worn or open factory unit lets the inside rear spin as soon as the car is pushed out of a corner. OS Giken’s patented pressure ring locks progressively with torque, so the power goes down through both tires. It suits a C4 or early Viper used at track days, autocross or club racing, where consistent locking matters most.

Design and Performance

The friction plates run on splines through the side gears, fitting up to twice the plate count of competing designs. That clamping area handles big-displacement torque while a modest preload keeps the car civil on the road. Gears are raw-forged and the case is machined from one billet, and OS Giken can rebuild and retune it later.

Features

Clutch-type rear differential shared by the C4 Corvette and SR Viper
Plate area sized for big V8 and V10 torque
Patented pressure ring for progressive lock
Billet case and raw-forged gears
Rebuildable and retunable by OS Giken
Listed for manual-transmission cars

Applications

Chevrolet Corvette: C4 | 1986-1996 | 5.7L V8, manual
Dodge Viper: SR | 1992-2002 | 8.0L V10, manual

Notes

The Super Lock LSD for C4 Corvette and SR Viper cars is listed for manual-transmission cars
Installation labor is not included

Frequently Asked Questions

Does the Super Lock LSD for C4 Corvettes fit every C4? OS Giken lists the Super Lock LSD for C4 Corvette and SR Viper cars, part number CH051-HA, for manual-transmission C4 Corvettes from 1986 to 1996, with Turn 14 fitment data covering 1992 to 1996 including the ZR-1. Automatic C4s are not listed for this part, so confirm the transmission before ordering.
Why do a Corvette and a Viper share a differential? The C4 Corvette and the first-generation Viper use the same size of rear differential, so one OS Giken unit serves both. Fitment is decided by the axle, not the badge, which is why OS Giken lists them together. Check the axle in the car.
Is it strong enough for a V10 Viper? The Super Lock carries up to twice the friction plates of competing designs, which gives it the clamping area for high torque. OS Giken can raise initial torque or fit TCD spec discs for oil cooling on a modified or heavily tracked car.
What does it change on track? Both rear tires keep driving as the inside one unloads, so the car exits slow corners with more drive and less wheelspin. In a car with as much torque as a Viper, that also makes power delivery more predictable at the limit.
Can it be serviced later? Yes. The friction plates wear slowly with use, and OS Giken rebuilds and retunes Super Lock units in-house. For a collectible car that may be kept for decades, that makes the differential a long-term part rather than a consumable. Ask about rebuild timing.

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 C4 Chevrolet Corvette and SR Dodge Viper Manual [CH051-HA]

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OS Giken Super Lock LSD for C4 Chevrolet Corvette and SR Dodge Viper Manual

Design and Performance

Features

Applications

Notes

Frequently Asked Questions

About OS Giken

Reviews