Product
XinJin Auto Parts is a factory-direct manufacturer specializing in high-performance drivetrain components. Our product range covers the full drivetrain system — including ring & pinion gear sets, limited slip differentials (LSD), locking differentials (e-locker & air locker), differential assemblies, flanges, and brake proportional valves — providing a one-stop sourcing solution for distributors, workshops, and OEM buyers worldwide.
Backed by years of proven manufacturing experience, every component is built to OEM-grade quality standards with precision engineering and rigorous quality control — suitable for both OEM replacement and aftermarket upgrades. We offer competitive factory-direct pricing on both single units and bulk orders, with custom gear ratios and configurations available to meet your exact application requirements.
Trusted by partners across 50+ countries — from independent workshops to large-scale distributors and OEM buyers.
Why Choose Us?
Factory-direct pricing
We manufacture every product in-house — no middlemen, no markup. Lower costs and faster lead times, direct to you.
Quality tested, every batch
Every ring and pinion gear, locker differential, and LSD is inspected for dimensional accuracy and performance before shipment.
Full customization available
Custom gear ratios, locker configurations, LSD specs and more. Submit your drawings or samples — we handle the rest.
1-year warranty
Every product is backed by a 1-year warranty against manufacturing defects under normal use conditions. Our team is ready to assist with any quality concerns — your satisfaction is our priority.
24-hour response
Our drivetrain specialists respond to every inquiry within 24 hours — fitment questions, custom specs, or bulk orders.
From off-road 4×4 builds and motorsport applications to commercial truck fleets and OEM production lines — our ring and pinion gears, locker differentials, and LSDs serve every drivetrain need. Factory-direct manufacturing, OEM-grade quality, and custom configurations available — trusted by clients across 50+ countries.
- Off-road & 4×4 builds
Demanding terrain requires drivetrain components that won’t quit. Our air lockers, e-lockers, and high-ratio ring and pinion gears are built for rock crawlers, overlanders, and serious 4×4 builds where traction and reliability are non-negotiable. Compatible with the most popular off-road axle platforms worldwide.
- Repair shops & performance builders
Whether you run a busy repair shop handling daily drivetrain replacements or a performance garage building custom setups, XinJin supplies consistent, reliable stock. Fast replenishment, wide model coverage, and competitive wholesale pricing — everything a professional workshop needs to keep jobs moving.
- Aftermarket supply & custom manufacturing
For aftermarket distributors, auto parts wholesalers, and retailers sourcing reliable drivetrain components at scale. XinJin supplies ring and pinion gears, locker differentials, and LSDs with consistent quality, competitive factory-direct pricing, and flexible order quantities. Custom gear ratios, tooth profiles, and surface treatments available — submit your drawings or samples and we handle the rest.
Partner Testimonials
Their air lockers and diff kits are tough and customizable. Excellent support and fast response.
Automotive Distributor
Germany
Consistent quality in LSDs, elockers, and crown wheel & pinion sets. XJX Parts is a reliable long-term partner.
4x4 Retailer
Australia
XJX Parts delivered precise custom parts that fit perfectly and boosted our vehicle performance.
OEM Manufacturer
Middle East
Custom diff locks from XJX Parts fit perfectly, with outstanding quality and reliable performance.
Truck Parts Importer
South Africa
MOQ varies by product. For items available to purchase directly on our website, we ship from as little as 1 unit — no minimum required. For custom-manufactured components, MOQ depends on tooling and production requirements. Contact us and we’ll find the right fit for your volume.
Absolutely. We accept technical drawings, CAD files, or physical samples. Our engineering team will review your requirements and provide a feasibility assessment and quote within 24 hours.Absolutely. We accept technical drawings, CAD files, or physical samples. Our engineering team will review your requirements and provide a feasibility assessment and quote within 24 hours.
We accept X/T (bank transfer) and PayPal. For first-time orders, a deposit is typically required before production begins. Contact us to discuss payment terms that work for your order.
Our product pages list compatible axle platforms and vehicle models. If you’re unsure about fitment, send us your vehicle details or axle model — our technical team will confirm compatibility before you order.
Shipping time depends on your location and chosen freight method. Express courier (DHL, FedEx, UPS) typically takes 7-15 business days. Sea freight lead times vary by destination — we can advise on the best option for your order.
Yes. All XinJin products are covered by a 1-year warranty against manufacturing defects. If a product fails under normal use conditions — not caused by misuse, accidental damage, or improper installation — we will arrange a repair or replacement at no extra cost.
Yes. Our technical team is available to assist with installation guidance, fitment questions, and troubleshooting after your purchase. Reach out via email or our contact form and we’ll get back to you within 24 hours.
We ship to 50+ countries worldwide. We work with reliable freight forwarders and can assist with customs documentation, commercial invoices, and packing lists to ensure smooth delivery.
Partner with a Trusted Manufacturer
Are you a distributor or wholesaler looking for a reliable automotive parts supplier? XinJin Auto Parts offers a full range of products including limited slip differentials, crown wheel & pinion, locking differentials, differential assemblies, proportional valves, and flanges. We support customization to meet specific application requirements. For pricing, technical questions, or custom orders, feel free to contact us—our team is ready to assist you.
