Which cars does the Type-D Close-Ratio Gear Set for AE86 fit?

Cusco USA lists part number 116 028 AD for the Toyota Corolla GT-S (AE86, 1983-1987). The Type-D Close-Ratio Gear Set for AE86 goes inside the factory manual gearbox, so the gearbox has to come out and be stripped to fit it. Check the model and gearbox against the Applications list before ordering.

What does a close-ratio gear set change?

It narrows the gaps between gears, so the revs drop less on each upshift and the engine stays closer to the rpm where it makes its best power. On a circuit or a hill climb that means stronger drive out of every corner. The trade-off is a busier gearbox on the road, with more shifts needed to reach cruising speed.

Will it make pulling away harder?

Yes, a little. First gear on this set is taller than the factory first gear, so the car needs more revs and more clutch slip to pull away, especially on a hill or with a passenger. Most competition drivers accept this because first is rarely used once the car is moving.

Is it suitable for a road car?

It works on the road, but it is designed for competition. Closer ratios mean more shifts in town, and gear whine can be more noticeable than with factory gears. Owners who mostly drive on the road usually get more from a limited-slip differential or a final drive change first.

A transmission specialist. The gearbox has to come out of the car and be stripped down, and the shafts, bearings and synchronizers need to be inspected and set up correctly when it is rebuilt. It is efficient to fit a limited-slip differential or a new final drive at the same time.

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Description

Cusco Type-D Close-Ratio Gear Set for AE86 Toyota Corolla GT-S

Cusco’s Type-D Close-Ratio Gear Set for AE86 Toyota Corolla GT-S replaces 1st, 2nd and 3rd gears in the factory manual gearbox, along with the counter shaft they run on, with ratios chosen to close the gaps between gears. Raising the lower gears closer to the upper ones means a smaller drop in rpm on each upshift, so the engine stays nearer its power peak through a corner sequence or a sprint stage. It suits a car built for circuit, hill climb, gymkhana or rally use, where the car lives in the middle of the rev range.

Design and Performance

Gear ratios set how far the revs fall when the driver changes up. Factory ratios are spread to suit everything from pulling away on a hill to quiet highway cruising, which leaves big steps that drop a tuned engine below its best rpm. The Type-D Close-Ratio Gear Set for AE86 narrows those steps. The trade-off is a taller first gear than stock, so pulling away needs a little more clutch and revs, which matters most on the road and on a standing start.

Features

Close-ratio replacement for 1st, 2nd and 3rd gears
Smaller rpm drop on each upshift
Supplied with a matching counter shaft
Ratios set around a 4.300 final drive, per Cusco
Fits inside the factory gearbox case

Specifications

Cusco part number: 116 028 AD
1st gear: 2.471 (factory 3.587)
2nd gear: 1.696 (factory 2.022)
3rd gear: 1.237 (factory 1.384)
Final drive, per Cusco: 4.300
Position: Manual transmission

Applications

Toyota Corolla GT-S: AE86 | 1983-1987 | For T50 Transmission

Notes

Fitting means removing and stripping the gearbox; it is a job for a transmission specialist, and installation labor is not included
Made to order by Cusco in Japan; Cusco quotes 14 to 16 weeks for delivery

Frequently Asked Questions

Which cars does the Type-D Close-Ratio Gear Set for AE86 fit? Cusco USA lists part number 116 028 AD for the Toyota Corolla GT-S (AE86, 1983-1987). The Type-D Close-Ratio Gear Set for AE86 goes inside the factory manual gearbox, so the gearbox has to come out and be stripped to fit it. Check the model and gearbox against the Applications list before ordering.
What does a close-ratio gear set change? It narrows the gaps between gears, so the revs drop less on each upshift and the engine stays closer to the rpm where it makes its best power. On a circuit or a hill climb that means stronger drive out of every corner. The trade-off is a busier gearbox on the road, with more shifts needed to reach cruising speed.
Will it make pulling away harder? Yes, a little. First gear on this set is taller than the factory first gear, so the car needs more revs and more clutch slip to pull away, especially on a hill or with a passenger. Most competition drivers accept this because first is rarely used once the car is moving.
Is it suitable for a road car? It works on the road, but it is designed for competition. Closer ratios mean more shifts in town, and gear whine can be more noticeable than with factory gears. Owners who mostly drive on the road usually get more from a limited-slip differential or a final drive change first.
Who should fit it? A transmission specialist. The gearbox has to come out of the car and be stripped down, and the shafts, bearings and synchronizers need to be inspected and set up correctly when it is rebuilt. It is efficient to fit a limited-slip differential or a new final drive at the same time.

About CUSCO

CUSCO is the brand of Carrosser Co., Ltd., founded in December 1977 and based in Takasaki, Gunma Prefecture, Japan. Carrosser designs and builds coilovers, limited-slip differentials, clutches, roll cages and chassis parts, sells its steel cages under the Safety 21 name, and competes in every All Japan Championship category from circuit racing to rally and gymkhana. CUSCO USA, a division of Carrosser, is based in Huntington Beach, California.

Additional Information

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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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Cusco Type-D Close-Ratio Gear Set for AE86 Toyota Corolla GT-S [116 028 AD]

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Cusco Type-D Close-Ratio Gear Set for AE86 Toyota Corolla GT-S

Design and Performance

Features

Specifications

Applications

Notes

Frequently Asked Questions

About CUSCO

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