The Winters Quick-Change 850HP+ Differential is a proven, high-strength racing differential used by professional drag racing and drift teams worldwide, as well as in many championship-winning machines.
It combines the strength to withstand pro-level competition with ease of maintenance.
Standard Equipment
Heavy-Duty Aluminum Rigid Spool Differential (Lightweight & High-Rigidity)
Helical LSD type also available as an option
1350 Yoke & Heat-Treated Lower Shaft (pre-installed)
4.12 Ring & Pinion Gear standard equipment (currently the highest-strength combination)
Billet 6-bolt rear cover (allows for easier gear changes and faster final drive adjustments compared to the 10-bolt spec)
Heavy-Duty 31-spline 930-style CV side flanges included (rated for the 850HP class; *for models supporting over 1000HP or 1500HP, please see this page)
A variety of final gear sets are available, allowing you to change gear ratios in just a few minutes. (Click here for the ratio chart.)
At Shafutoya, we carry a wide range of skid plates for quick-change units. Skid plates are essential for quick-change differentials as they protect the diff case from damage and wear caused by road contact.
We also handle custom driveshaft fabrication suitable for quick-change units, as well as other repair and optional parts. For details, please check here.
Winters quick-change units use the 1350-series differential flange. We strongly recommend using Mark Williams billet high-strength U-joint strap kits when installing your driveshaft.
Lead Time
All Winters quick-change differentials are hand-assembled one by one by technicians in the USA to meet specific requirements. While we may have items in stock at our warehouse, if an item is out of stock, it may take several weeks from order to shipment; please inquire in advance regarding lead times.
Regarding Past Casting Issues
In the past, some production lots experienced casting defects that led to case cracking. Winters has since modified the casting structure and design and updated the aluminum alloy, effectively resolving the issue. You will not encounter such problems with current production lots.
Before You Order
〇 Regarding Import Consumption Tax
At the Shafutoya shopping site, we cover the import consumption tax incurred during customs clearance. You will not be charged any additional fees beyond the total amount paid at checkout.
〇Checking Compatibility
Our entire product database is based on North American specification vehicles (USDM). Please verify whether the product is compatible with your Japanese-spec vehicle (JDM) before ordering. (If you are unsure if the listed product is compatible with your vehicle, please feel free to contact us. Our support team will be happy to look it up for you.)
If you place an order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if items are sorted by selecting the year, make, and model on our top page, it does not guarantee a direct fit on Japanese-spec vehicles without modification.
All products have been translated into Japanese using translation software. If you find any confusing expressions or have questions, please contact us before ordering.
○ Regarding Shipping
Shipping costs are paid at the time of checkout. Estimates for shipping can be calculated automatically by entering your shipping address on the checkout page. For large items like body parts, there may occasionally be a significant discrepancy between the automatically calculated shipping cost and the actual cost. In such cases, we will contact you individually via email.
In principle, all products are shipped internationally from our US warehouse. Unlike domestic Japanese shipping, please allow 7 to 14 days for delivery, so please place your order with time to spare. If you are in a hurry, please contact us in advance to confirm delivery times. All items are transported via air freight; they are never shipped by sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
In principle, all products we handle are designed and manufactured outside of Japan. Please note that they do not comply with "Japanese vehicle inspection standards," and we cannot provide strength evaluation documents or similar paperwork for these inspections. All parts are sold for the purpose of use on "circuits, private land, or off-road," and any installation or use is at your own risk.
○ Regarding Warranty
Please inspect your items immediately upon arrival. Since all products are shipped internationally, there may be instances of damage to the packaging or the product due to shipping. We will handle returns, refunds, or exchanges only if contacted within 7 days of receipt for items that arrived damaged, are defective, or are different from what you ordered. Please understand that for products sold through us, warranty support will be handled "only through us." We do not coordinate with other companies or agencies located within Japan.