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SITCSection 7
U.S. imports of gear boxes (SITC 78434) totaled $940.6M in July 2026, traded with 75 countries.
Importers of Gear Boxes paid $44.8M in duties in July 2026 — an effective duty rate of 8.9% on $504.7M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataAutomotive gear boxes are precision-engineered transmission components that translate engine torque into usable wheel speed across a range of gear ratios, making them critical inputs for vehicle assembly and aftermarket repair supply chains. Classification hinges on whether the unit is a complete gearbox assembly or a sub-component, a distinction that affects both duty treatment and valuation methodology. Importers sourcing from high-volume manufacturing countries should be aware that automotive parts in this category may be subject to Section 232 tariff considerations depending on origin and product scope.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
21.0K shipments/mo
A complete gear box is generally classified as such even if it lacks minor accessories, provided it retains the essential character of a finished transmission unit. Sub-components — such as individual gear sets, shafts, or housings — are typically classified separately under parts provisions. Importers should document the functional completeness of the unit and consult a licensed customs broker to confirm the correct classification.
Certain automotive parts, including gear boxes, may fall within the scope of Section 232 national-security tariff actions depending on the specific HTS classification and country of origin. Importers should verify current applicability with a licensed customs broker before entry.
Basic heading 25 of 642 in section 7
Basic heading 78434 · $940.6M of $175.6B
ImportsExports
Imports
$940.6MYoY · Pro
Exports
$649.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Imports · July 2026
origin
Mexico and Japan together supply 58% of it.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
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