Replacement 10-spline lower shaft, standard equipment for Winters Performance 10-inch quick-change differentials. (Part #17 in the exploded view)
This 5003 shaft is heat-treated for enhanced durability and strength, delivering consistent performance even under high-load conditions. As a primary component of the quick-change differential, which is subjected to significant forces from the engine, transmission, and driveshaft, this shaft is prone to twisting and wear in high-horsepower vehicles and those equipped with high-grip tires. We strongly recommend regular replacement and keeping a spare on hand.
Specifications
Part Number: 5003
Processing: Heat-treated
Spline Count: 10-spline
Compatibility: Winters Performance 10-inch quick-change differentials
Part #: 17 (exploded view)
Key Features
High-precision machining for smooth gear splines
Heat treatment provides resistance to wear and distortion, ensuring a long service life even under hard use
Maintains consistent reliability even for vehicles with frequent gear set changes
Notes
Please verify shaft compatibility beforehand.
Ensure proper backlash adjustment during assembly.
Professional installation by a qualified specialist is recommended.
※ Winters quick-change lower shafts are also available in a 32-spline model. Please confirm the spline count of your differential before ordering.
For information on the 350M reinforced lower shaft standard in 1500HP+ quick-change models, please click here.
Before You Order
〇 Import Consumption Tax
At Shafutoya, we cover the import consumption tax incurred during customs clearance, so you will not be charged any additional fees beyond the total amount shown at checkout.
〇 Compatibility Verification
Our entire product database is based on North American (USDM) vehicles. Please verify compatibility with Japanese (JDM) vehicles before ordering. (If you are unsure if a 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.)
We cannot accept returns due to incompatibility if an order is placed without prior verification.
Please note that even if items are sorted by selecting the year, make, and model using the tabs on our top page, it does not guarantee a direct fit for Japanese-spec models without modification.
All product descriptions are translated into Japanese using software. There may be confusing expressions, so please contact us before ordering if you have any questions.
○ Shipping Information
Shipping costs are paid at checkout. Quotes are calculated automatically once you enter your shipping address on the checkout page. For large items such as body parts, the actual shipping cost may significantly differ from the automated calculation in rare cases. 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 delivery typically takes 7 to 14 days, so please allow sufficient time for your order. If you are in a hurry, please contact us to confirm delivery dates beforehand. All items are shipped via air freight; we do not use sea freight.
○ Japanese Vehicle Inspection Compliance
Please note that all products we handle are designed and manufactured outside of Japan. They are not compliant with "Japanese vehicle inspection standards," and we cannot provide documents such as strength calculation reports. Therefore, all parts are sold for "circuit, private property, and off-road use only," and their installation and use are at your own risk.
○ Warranty Policy
Please check the contents of your order as soon as it arrives. As all products are shipped internationally from outside Japan, there is a possibility of damage to the packaging or the product during transit. We will handle returns, refunds, or replacements only if you contact us within 7 days of receipt regarding items that are damaged, defective, or incorrect. Please understand that all warranty claims for items sold through us must be handled "exclusively through us." We do not provide service through other third-party companies or distributors located within Japan.