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Designed specifically for 7-speed torque converter manual transmissions used in dump trucks, our truck gearbox synchronizer sleeve strictly adheres to EIRO standards and OEM specifications, delivering reliable performance even under extreme load and harsh operating conditions. As a leading manufacturer of heavy-duty truck transmission parts, SINOASCEND produces high-quality heavy duty truck synchronizer sleeves with a monthly production capacity of 5000 pieces, ensuring stable supply for global commercial buyers and fleet operators. Our products are widely used in Southeast Asia and Africa, earning a solid reputation for durability and cost-effectiveness that reduces long-term maintenance costs for vehicle operators.
Our 7-speed truck gearbox synchronizer sleeve achieves ISO 6-8 level tooth profile accuracy with a tooth surface roughness Ra≤1.6μm, ensuring perfect meshing and minimal noise during gear changes. Dimensional stability is strictly controlled, with tooth alignment error ≤0.02mm after heat treatment, eliminating assembly mismatches and guaranteeing consistent power transmission. This precision reduces driver fatigue and extends the service life of adjacent gearbox components by minimizing wear.
We employ a precision closed-die forging process that refines the internal grain structure of steel, significantly improving overall strength and impact resistance. Our proprietary surface strengthening technologies include carburizing/carbonitriding, which achieves a surface hardness of 58-62HRC with an infiltration layer depth of 0.8-1.2mm, and shot peening treatment that introduces residual compressive stress, increasing fatigue life by 20-30%. These processes ensure our dump truck synchronizer sleeve can withstand repeated high-torque loads without premature wear or fracture.
We select high-grade alloy steel and tailor heat treatment processes (carburizing and induction hardening) based on actual load requirements, perfectly balancing surface hardness and core toughness. This prevents common defects in low-quality products such as core softening or surface brittleness, ensuring long-term reliability in heavy-duty construction and mining applications.
Basic Info. | |
Model NO. | Cooling System |
1325333018 | Air Cooled |
Efficiency | Material |
Triple Plate Clutch | Steel |
Speeds | Torque Capacity |
7-speed | 1000 lb-ft |
Type | Warranty |
Torque Converter MT | 1year |
Payment | Shipping |
Tt L/C | by Sea |
Brand | Truck Type |
Sinoascend | Dump Truck |
Transport Package | Specification |
Standard Packagingwooden Box | OEM Standard Size |
Trademark | Origin |
SINOASCEND | Jinan Shandong, China |
HS Code | Production Capacity |
8708507990 | 5000PCS/Month |
Packaging & Delivery | |
Package Size | Package Gross Weight |
50.00cm × 50.00cm × 60.00cm | 3.000kg |
1316 304 010 | Two shaft first gear |
1316 304 002 | Two shaft second gear |
1356 302 103 | Input shaft |
1316 302 067 | input shaft gear |
1316 304 103 | Two-axis step gear |
1316 303 071 | Counter shaft gearing gear |
1316 303 065 | Counter shaft fourth gear |
1316 305 008 | Idler |
1356 304 035 | Two axis |
1316 304 008 | Two-shaft third-speed gear |
1316 303 005 | Countershaft third gear |
1316 303 033 | intermediate shaft |
1316 304 235 | reverse gear |
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SINOASCEND operates two modern manufacturing facilities with over 500 skilled production staff, specializing in heavy-duty truck parts since 2011. Our EIRO standard synchronizer sleeve undergoes a rigorous 5-stage production process: precision forging → rough machining → controlled heat treatment → CNC precision machining → surface treatment, with 100% quality checks at each critical stage. We hold ISO 9001:2015 certification and conduct comprehensive laboratory testing, including hardness testing, metallographic analysis and dimensional verification, to ensure every product meets international quality standards. Pre-production samples are always provided for customer confirmation, and a final full inspection is performed before shipment to eliminate defects.
We understand that different truck models and applications require tailored solutions. Our OEM standard synchronizer sleeve supports full customization to meet your specific requirements:
Custom dimensions and specifications according to your technical drawings or physical samples
Brand labeling and packaging customization to enhance your brand image
Free sample provision (freight not included)
Flexible production schedules to accommodate both small batch and large volume orders
It slides along the transmission shaft to engage and disengage gears during shifting, ensuring smooth and efficient power transfer between different gear ratios.
It is specifically designed for 7-speed dump trucks equipped with torque converter manual transmissions.
We offer a 1-year warranty against any manufacturing defects in materials and workmanship.
3-7 days for in-stock items, and 20-30 days for custom or out-of-stock orders, depending on order quantity.
