U.S. imports of Gear Boxes (SITC 78434) totaled $1.0B in August 2026, imported from 79 countries.
Importers of Gear Boxes paid $49.3M in duties in August 2026, an average duty rate of 4.79% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 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.
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21.0K import shipments a month
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 26 of 642 in section 7
Basic heading 78434 · $1.0B of $172.0B
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Imports · August 2026
origin
Mexico and Japan together supply 64% 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.
ImportsExports
Imports
$1.0BYoY · free account
Exports
$680.1MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $11.2B of Gear Boxes.
Through August 2026 · exports 10 of 12 months reported. Source: U.S. Census Bureau.