What is the difference between a 1.5 Way and a 2 Way LSD?

A 2 Way LSD engages both under acceleration and deceleration, providing stability during both power application and engine braking. A 1.5 Way LSD primarily engages under acceleration but has a lighter engagement during deceleration, offering a slightly different feel during cornering and braking.

What else is needed for installation?

Installation requires specialized tools and knowledge for proper setup and backlash adjustment. You will also need specific differential fluid formulated for clutch-type limited-slip differentials, as recommended by Cusco.

Does this differential require a break-in period?

Yes, clutch-type limited-slip differentials typically require a break-in period to allow the clutch plates to properly seat. Refer to the manufacturer's installation instructions for the specific break-in procedure recommended by Cusco.

Specifications

Brand: Cusco
Part #: LSD 428 L2
UPC: 4996338018915

Cusco LSD RS 2 Way (1.5&2) Rear 05-25 NC Miata Rear Differential

Name: Cusco LSD RS 2 Way (1.5&2) Rear 05-25 NC Miata Rear Differential
Brand: Cusco
SKU: cusco-cusco-lsd-rs-2-way-1-5-2-rear-05-25-nc-miata-rear-differential-t14-495189
Price: 1420.80 USD
Availability: BackOrder

$1420.80

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Fits 2006-2010 Mazda MX-5 Miata. Cusco RS 2 Way rear differential for improved traction and handling.

Key Features

Fits 2006-2010 Mazda MX-5 Miata.
Cusco RS 2 Way clutch-type limited-slip differential.
Provides improved traction and handling by locking rear wheels under acceleration and deceleration.
Unique cone-washer system offers progressive engagement.
Designed as a direct replacement for the factory differential.
Part number LSD 428 L2.

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About this part

Product Details

When you're looking to get the most out of your 2006-2010 Mazda MX-5 Miata's performance, especially on the track or during spirited driving, a limited-slip differential (LSD) makes a big difference. This Cusco RS 2 Way differential is designed to replace your factory open differential, giving you much more consistent power delivery to both rear wheels. It's a well-built unit that uses a clutch-type mechanism to lock the rear wheels together under acceleration, helping to prevent wheelspin and put power down more effectively, especially when exiting corners. The '2 Way' designation means it engages both under acceleration and deceleration, which can help stabilize the rear end during braking and cornering, offering a more predictable feel.

Cusco is well-known for making solid drivetrain components, and this RS series differential is a popular choice for Miata owners looking for an improved driving experience. The RS series uses a unique cone-washer system that allows for a more progressive engagement compared to some other clutch-type LSDs. This means it can offer a good balance between aggressive locking action when you need it and a smoother operation during everyday driving. It's designed to fit directly into the factory differential housing, making the installation process more straightforward, though it does require specialized knowledge and tools for proper setup and fluid changes. You'll want to ensure you have the correct differential fluid for clutch-type LSDs, as using the wrong type can affect performance and longevity.

This differential is a significant upgrade for any Miata owner focused on performance driving. It comes as a complete unit ready for installation into your existing rear axle assembly. Proper installation and maintenance are key to enjoying the benefits of this LSD for years to come. Be sure to consult the manufacturer's instructions for specific break-in procedures and fluid recommendations to get the most out of your new Cusco differential.