8708.40.70.00 - Of cast iron

This HTS category, 8708.40.70.00, specifically classifies parts of gearboxes that are manufactured from cast iron, intended for use with motor vehicles falling under headings 8701 through 8705. This includes components such as housings, gears, or casings that are primarily composed of cast iron and are integral to the functioning of a vehicle's transmission system.

This classification distinguishes itself from its sibling category, 8708.40.75, which covers "Other" parts of gearboxes. While 8708.40.75 encompasses a broad range of gearbox parts not made of cast iron, this category is exclusively for those components where cast iron is the predominant material, simplifying identification based on material composition.

As this is a leaf node in the HTS structure, there are no further subcategories. Therefore, precise classification relies on confirming that the part is indeed for a gearbox of a motor vehicle of headings 8701-8705 and that its construction is predominantly of cast iron. Examples include cast iron gear housings, clutch housings, or transfer case components that meet these criteria.