What is the main benefit of a 1-way limited-slip differential?

A 1-way limited-slip differential primarily locks under acceleration. This means it helps transfer power to the wheel with more grip when you're accelerating out of a corner, improving traction and reducing inside wheelspin. It generally offers a smoother engagement compared to some other LSD types.

What type of fluid should I use with this Cusco LSD?

It is essential to use the specific differential fluid recommended by Cusco for this RS 1-Way LSD. Using the correct fluid ensures proper operation, longevity, and performance of the limited-slip differential. Refer to the manufacturer's installation guide or Cusco's technical documentation for the exact fluid specifications.

Does this differential come with all necessary installation hardware?

This listing is for the Cusco LSD RS 1-Way differential unit itself. While it is designed as a direct replacement for the factory differential, it typically does not include additional installation hardware such as bearings or seals. It is recommended to inspect and potentially replace these components during installation, and to consult the manufacturer's instructions for a complete parts list.

Specifications

Brand: Cusco
Part #: LSD 684 F
UPC: 4996338018342

Cusco LSD RS 1-Way(1&2) Rear Subaru 08-13 SH Forester EJ25T / 5AT

Name: Cusco LSD RS 1-Way(1&2) Rear Subaru 08-13 SH Forester EJ25T / 5AT
Brand: Cusco
SKU: cusco-cusco-lsd-rs-1-way-1-2-rear-subaru-08-13-sh-forester-ej25t-5at-t14-105741
Price: 1488.00 USD
Availability: BackOrder

$1488.00

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits 2008-2013 Subaru Forester SH models with EJ25T engine and 5-speed automatic transmission.
Cusco RS 1-Way limited-slip differential design.
Provides improved traction and handling during acceleration.
Smooth and predictable engagement for performance driving.
Designed for rear axle application.
Built by Cusco, a reputable manufacturer of performance drivetrain components.

This differential is specifically designed for the 2008-2013 Subaru Forester SH models equipped with the EJ25T engine and 5-speed automatic transmission. Please verify your vehicle's specifications to ensure compatibility.

Secure CheckoutFast Shipping631-982-0042

About this part

Product Details

This is the Cusco RS 1-Way limited-slip differential (LSD) for the rear of your 2008-2013 Subaru Forester equipped with the EJ25T engine and 5-speed automatic transmission. A limited-slip differential is a crucial component for performance driving, especially if you're looking to improve traction and handling during spirited driving or on track. It works by transferring torque to the wheel with more grip, preventing wheelspin and helping you put power down more effectively out of corners.

The RS 1-way design from Cusco is known for its smooth engagement and predictable behavior. In this setup, the differential locks under acceleration, providing enhanced traction when you need it most. The '1&2' designation refers to the specific ramp angles used, which influence how aggressively the differential locks and unlocks. This particular unit is well-suited for drivers who want improved cornering grip and stability during acceleration without the harshness sometimes associated with other LSD types. Cusco is a well-known name in the performance automotive world, and their differentials are built with precision to handle the demands of performance driving.

When installing a limited-slip differential, it's important to use the correct differential fluid as recommended by Cusco. This ensures the LSD operates as intended and maximizes its lifespan. This differential is designed as a direct replacement for your factory unit, but professional installation is recommended to ensure proper setup and alignment. You'll notice a significant improvement in how your Forester handles acceleration out of turns, with less inside wheelspin and a more planted feel.