What is the main benefit of a 2-way limited-slip differential?

A 2-way LSD locks up during both acceleration and deceleration. This provides more consistent traction and stability, especially when cornering or engine braking, compared to an open differential or a 1-way LSD.

Does this LSD come with all necessary installation hardware and fluids?

This listing is for the Cusco Type RS 2-way LSD unit itself. It does not typically include installation hardware like bearings or seals, nor does it include differential fluid. You will need to source these separately and ensure they are compatible with your vehicle and the LSD.

What is the difference between a 1.5-way and a 2-way LSD?

A 1.5-way LSD locks during acceleration and partially during deceleration. A 2-way LSD locks fully during both acceleration and deceleration, offering more consistent control during engine braking and corner entry.

Specifications

Brand: Cusco
Part #: LSD 120 F2
UPC: 4996338010797

Cusco LSD Type RS 2 Way Rear for 9/89-9/93 Mazda MX-5 (NA6CE)

Name: Cusco LSD Type RS 2 Way Rear for 9/89-9/93 Mazda MX-5 (NA6CE)
Brand: Cusco
SKU: cusco-cusco-lsd-type-rs-2-way-rear-for-9-89-9-93-mazda-mx-5-na6ce-t14-252681
Price: 1296.00 USD
Availability: BackOrder

$1296.00

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Fits 1990-1997 Mazda Miata. Cusco Type RS 2-way rear LSD for improved traction and cornering.

Key Features

Fits 1990-1997 Mazda Miata.
Cusco Type RS 2-way limited-slip differential.
Clutch-type LSD provides active torque distribution to both rear wheels.
2-way locking action improves traction during acceleration and deceleration.
Unique cone spring system maintains consistent locking force.
Designed for direct fitment into the factory differential housing.

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About this part

Product Details

This is the Cusco Type RS 2-way limited-slip differential (LSD) specifically for your 1990-1993 Mazda Miata (NA6CE chassis). If you're looking to significantly improve your Miata's traction, especially during spirited driving or track use, an LSD is a key component. Unlike an open differential, which sends power to the wheel with the least resistance (often leading to one wheel spinning uselessly), a limited-slip differential actively distributes torque to both rear wheels. This means more power gets to the ground, improving acceleration out of corners and overall stability.

The Type RS is a clutch-type LSD, known for its smooth engagement and progressive locking action. The '2-way' designation means it locks up not only when you're accelerating but also when you're decelerating or coasting. This provides consistent control and predictability during both throttle application and engine braking, which can be a real advantage when you're pushing the car hard. Cusco is well-regarded for their performance drivetrain components, and the Type RS uses a unique cone spring system that helps maintain consistent locking force over time, even under demanding conditions. This design also helps to reduce chatter during low-speed maneuvers, making it more streetable than some other types of LSDs.

Installation of a differential requires specialized tools and knowledge, including setting backlash and gear patterns. It's a job best left to experienced mechanics. This LSD is designed to fit directly into the factory differential housing, but it's important to ensure you have all the necessary supporting components and fluids for a proper installation. If you're serious about getting the most out of your Miata's performance, this Cusco LSD is a solid upgrade that will change how the car puts power down.