This Winters Performance spool, SR3353-31HD, is a replacement part for spools standardly equipped on 31-spline Quick Change differentials. Crafted from high-strength steel, this rigid spool eliminates the rotational speed difference between the left and right wheels, transmitting 100% of the power to both tires. In diagram: #56
Unlike open differentials or LSDs, a spool eliminates the rotational difference between the left and right sides, significantly improving traction during acceleration and corner exits. It is an extremely effective performance part for competition vehicles that need to transfer power to the road without waste.
At the same time, this part is subject to heavy loads; because long-term use can cause spline play or twisting, we recommend regular replacement or keeping a spare on hand.
Features
Heavy-duty specifications with high-strength steel construction for excellent durability
Reliable, genuine Winters parts compatible with 10-inch Quick Change differentials
Ideal for users seeking more direct drive than an LSD provides
High traction, high strength, high reliability
In diagram: #56
※Winters Performance 10-inch Quick Change differentials are available in 31-spline and 35-spline versions. Please confirm the spline count of your differential before ordering.
※Shafutoya also stocks side flanges for Winters Performance 10-inch Quick Change differentials. As these are also high-load parts, we recommend regular replacement or having spares available. For more details, click here.
Before Ordering
〇 Regarding Import Consumption Tax
At Shafutoya, we pay the import consumption tax incurred during customs clearance on your behalf, so you will not be charged any additional fees beyond the total amount paid at checkout.
〇Confirmation of Compatibility
All product databases are based on North American vehicles (USDM). Please confirm whether or not the product is compatible with Japanese vehicles (JDM) before ordering. (If you are unsure if a listed product fits your vehicle, please feel free to contact us. Our support team will be happy to assist you.)
If you order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if items are sorted by year, make, and model using the tabs on our homepage, it does not guarantee that they will fit Japanese-spec models without modification.
All products have been translated into Japanese using translation software. If there are any ambiguous expressions, please contact us before ordering.
○ Regarding Shipping
Shipping costs are paid at the time of settlement. Estimates are automatically calculated when you enter your shipping address at checkout. In rare cases, the actual shipping cost for large items such as body parts may differ significantly from the automated calculation. If this occurs, we will contact you via email separately.
All products are generally shipped internationally from our U.S. warehouse. Unlike domestic shipping within Japan, international shipping takes approximately 7 to 14 days, so please allow ample time for delivery. If you are in a hurry, please contact us in advance to confirm the delivery schedule. Note that all products are transported via air freight; they are never shipped by sea.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
The products we handle are designed and manufactured outside of Japan. Please note that they are not compliant with the "Japanese Vehicle Inspection System," and we cannot provide structural strength documentation or similar paperwork for these systems. Therefore, all parts are sold for "circuit, private property, or off-road use only," and installation and use are at your own risk.
○ Regarding Warranty
Please inspect the contents immediately upon arrival. Since all products are shipped internationally, there may be shipping damage to the packaging or the product itself. Please understand that we only provide returns, refunds, or exchanges for shipping-damaged items, defective products, or incorrect items if you contact us within 7 days of receipt. Additionally, for products sold through us, all warranty-related support will be handled "exclusively through us." Please note that we do not coordinate with other companies or agencies located within Japan.