<p><strong>HHT95 Middle-Axle Gear Set HD90129321004 / HD90129321007</strong> is supplied for HHT95 middle axle. This axle drivetrain component transmits torque through the middle-axle reduction and differential geartrain.</p><h2>Product identification</h2><ul><li><strong>Brand/application:</strong> Sinotruk, Shacman or specified heavy-equipment system</li><li><strong>Part number:</strong> HD90129321004 / HD90129321007</li><li><strong>Application:</strong> HHT95 middle axle</li><li><strong>Component type:</strong> axle drivetrain component</li></ul><h2>Function and service notes</h2><p>This component transmits torque through the middle-axle reduction and differential geartrain. Correct identification helps prevent mismatch between chassis, cab, engine and driveline variants.</p><h2>Fitment verification</h2><p>Verify tooth counts, ratios, spline profiles, axle model and mating gears. Confirm the chassis or component nameplate before shipment.</p><h2>Inspection, packing and export</h2><p>Top Run checks markings, interfaces and shipment condition. Electronic parts receive anti-static cushioning, hydraulic or pneumatic ports are capped, and metal parts receive suitable corrosion and impact protection.</p><h2>Frequently asked questions</h2><h3>How do I confirm the correct truck version?</h3><p>Provide the VIN or chassis model, assembly nameplate, original part number, connector or port details and clear photos.</p><h3>Can similar-looking parts be interchangeable?</h3><p>Not necessarily. Internal function, voltage, dimensions, ratios or interfaces may differ between production versions.</p><h3>How is the part packed for export?</h3><p>Packaging is selected by weight and sensitivity, using labelled cartons, foam cushioning or reinforced plywood cases.</p><p>Contact Top Run for availability and a confirmed quotation.</p>