Product Introduction

This heavy-duty cast housing is the foundational component of the rear axle’s main reducer assembly. It provides a rigid, precision-aligned enclosure for the differential gears and drive pinion, ensuring they operate smoothly under extreme torque loads while maintaining lubrication and protection from contaminants.

Structure & Material

• Material: High-strength ductile cast iron, selected for its exceptional rigidity, impact resistance, and ability to dampen vibration. The material also withstands the thermal stress generated by high-torque operation.

• Design: A one-piece cast housing with precision-machined mounting surfaces, bearing bores, and a sealed cavity for lubricating oil. It features integrated mounting flanges for attachment to the axle housing and axle shafts, as well as access points for lubrication and maintenance.

Performance

• Rigid Structural Support: The ductile iron construction provides a stable platform for the differential gears, maintaining precise alignment even under extreme torque.

• Lubrication Containment: The sealed cavity holds gear oil to lubricate the differential components, reducing friction and heat buildup.

• Vibration Damping: The cast iron material absorbs drivetrain vibration, reducing noise and improving component longevity.

Durability

• Ductile cast iron resists deformation, cracking, and fatigue under continuous heavy loads and shock impacts.

Core Function

1. Structural Enclosure: Houses and supports the rear axle differential gear set and drive pinion.

2. Precision Alignment: Maintains precise gear positioning for optimal meshing and load distribution.

3. Lubrication Management: Contains gear oil to lubricate and cool differential components.

Rear Axle Main Reducer Housing 711-35301-6117 for Sinotruk Sitrak – Factory Direct Supply

When your Sinotruk Sitrak heavy-duty truck demands a reliable rear axle main reducer housing, precision engineering isn’t optional — it’s essential. The 711-35301-6117 rear axle main reducer housing serves as the structural backbone of your rear axle assembly, protecting every internal drivetrain component while enduring extreme loads day after day. Sourced directly from our factory, this genuine-spec housing delivers the exact fit, durability, and performance that fleet managers and procurement professionals expect from a trusted supplier.

At Mettlead, we specialize in supplying original-quality Chinese brand truck parts to buyers worldwide. Whether you’re maintaining a single vehicle or managing a large fleet, this reducer housing is engineered to keep your Sitrak trucks running smoothly — without the inflated middleman pricing.

Key Features and Benefits of the 711-35301-6117 Reducer Housing

This rear axle main reducer housing does far more than simply “hold parts together.” It plays a critical role in the overall performance and longevity of your drivetrain. Here’s what sets it apart:

• Precision-Cast Construction: Manufactured using high-grade cast iron alloy, this housing maintains dimensional stability even under heavy torque loads and thermal cycling.
• Perfect OEM Fitment: Designed to match the exact specifications of the original Sinotruk Sitrak part number 711-35301-6117, so installation is seamless with no modifications required.
• Superior Internal Protection: The housing fully encases the main reduction gears, bearings, and differential components, shielding them from road debris, moisture, and contaminants.
• Optimized Lubrication Channels: Internal passages are engineered to ensure consistent oil flow, reducing friction and extending the service life of all enclosed components.
• Corrosion-Resistant Surface Treatment: A protective coating guards against rust and oxidation, which is especially important for trucks operating in humid or coastal environments.
• Rigorous Quality Control: Every unit undergoes strict dimensional inspection and pressure testing before shipment, ensuring zero-defect delivery to your warehouse.

In other words, this housing doesn’t just fit — it performs. And because it comes directly from our factory, you’re getting top-tier quality at a price that makes your procurement budget work harder.

Application Scenario: Where Does This Reducer Housing Belong?

Understanding exactly where and how this part functions helps you make a confident purchasing decision. The 711-35301-6117 rear axle main reducer housing is specifically designed for the following application:

• Compatible Vehicle: Sinotruk Sitrak heavy-duty trucks (C7H, G7, and related series equipped with the matching rear axle assembly)
• Installation Position: Rear axle — main reducer assembly
• Primary Function: Houses and protects the main reduction gear set, accommodating the principal reducer mechanism within the rear axle
• Protective Role: Shields internal transmission components — including ring gears, pinion shafts, and bearings — from external damage and contamination
• Structural Role: Provides the rigid mounting framework that maintains precise gear alignment under dynamic driving loads

If your Sitrak truck is experiencing drivetrain noise, oil leakage from the rear axle, or you’re performing a scheduled overhaul, this reducer housing is likely the component you need. For a complete overview of all available Sitrak components, visit our Sitrak Heavy-Duty Parts catalog.

Technical Specifications

Below you’ll find the detailed specifications for this rear axle main reducer housing. These parameters help ensure you’re ordering the correct part for your specific vehicle configuration:

Need to browse more rear axle components? Explore our full Rear Axle Parts category for additional housings, gears, shafts, and related assemblies.

OEM and ODM Capabilities

We understand that different markets have different requirements. That’s why Mettlead offers flexible OEM and ODM services tailored to the needs of distributors, wholesalers, and fleet operators around the globe:

• White-Label Packaging: Want to sell under your own brand? We provide neutral or custom-branded packaging that aligns with your company identity — no minimum branding fees.
• Custom Packaging Solutions: From individual protective boxes to bulk pallet configurations, we adapt packaging to suit your logistics and storage requirements.
• Strict Quality Control: Our QC process includes raw material inspection, in-process dimensional checks, and final pressure testing. Every housing that leaves our facility meets or exceeds OEM tolerances.
• Flexible Order Quantities: Whether you need a single replacement unit or a container load for your warehouse, we accommodate orders of all sizes with competitive factory-direct pricing.
• Fast and Reliable Delivery: With established logistics partnerships, we ensure your parts reach you on schedule — because downtime costs money.

Additionally, if you’re sourcing across multiple Sinotruk platforms, our catalog covers HOWO, Sitrak, Shacman, FAW, Weichai, Dongfeng, and Foton parts. Check our Sinotruk Sitrak Truck Parts Full Category Guide for a comprehensive overview of everything we supply.

Frequently Asked Questions

What exactly does the rear axle main reducer housing do?

Think of it as the protective shell and structural frame for your rear axle’s main reduction gear set. It houses the ring gear, pinion gear, differential, and associated bearings in precise alignment. Without a properly functioning housing, these internal components would be exposed to contamination and lose their critical alignment — leading to premature wear, noise, and eventual failure.

How do I confirm that part number 711-35301-6117 fits my truck?

The most reliable method is to cross-reference the part number stamped on your existing reducer housing. If the number matches 711-35301-6117, you’re good to go. Alternatively, provide us with your vehicle’s VIN or chassis number, and our technical team will verify compatibility for you.

What are the signs that my reducer housing needs replacement?

Common indicators include visible cracks or fractures on the housing surface, persistent oil leaks around the rear axle center section, unusual grinding or whining noises from the drivetrain, and metal debris found in the axle oil during routine maintenance. If you notice any of these symptoms, inspecting the housing should be a priority.

Is this an original Sinotruk part or an aftermarket replacement?

This is an OEM-equivalent aftermarket part manufactured to match the original Sinotruk specifications for part number 711-35301-6117. It undergoes the same dimensional and material standards as the factory-installed component, ensuring identical fitment and performance — but at a more competitive price point.

Can I order just one unit, or is there a minimum order quantity?

We welcome orders of any size. Whether you need a single housing for an urgent repair or bulk quantities for inventory replenishment, Mettlead accommodates your needs with the same level of service and quality assurance.

How is the reducer housing packaged for international shipping?

Each housing is individually wrapped in protective material and placed in a reinforced carton to prevent damage during transit. For bulk orders, we use wooden crates or palletized packaging. Custom packaging and labeling are also available upon request.

Ready to Secure Your Rear Axle Main Reducer Housing?

Every day your truck sits idle waiting for parts is a day of lost revenue. Don’t let a damaged or cracked reducer housing slow down your operations. The 711-35301-6117 rear axle main reducer housing is in stock and ready to ship directly from our factory to your door — with competitive pricing, reliable quality, and fast turnaround.

Get your quote today. Simply contact us with your part number, required quantity, and destination. Our team typically responds within 24 hours with pricing, lead time, and shipping options tailored to your needs.

Mettlead — Your factory-direct source for Sinotruk Sitrak truck parts, delivered worldwide with confidence.