1626-780 – Tri Quad Prongs – Bolt Circle Dia 78MM – Bolt Hole Dia 12MM – Butt Dia 1.844

The 1626-780 is a tri or quad prong driveshaft adapter with a 78MM bolt circle and 12MM bolt hole diameter. Prong-type adapters are used on European and import vehicle driveshafts -- particularly those from manufacturers that use a bolted multi-arm joint rather than a conventional flex disc or U-joint at the driveshaft ends.

Specifications

Prong Adapter Applications

Tri and quad prong driveshaft components are standard on Hyundai, KIA, and certain European platforms that use a spigot-bolt joint at the gearbox or differential end of the driveshaft. The bolt circle diameter is the primary fitment criterion -- the prong adapter's holes must align with the mating flange's stud or bolt pattern. The 78MM bolt circle of the 1626-780 matches the HYNDAI SANTA FE pattern for direct bolt-up fitment.

Butt diameter of 1.844 inches accepts the specified 2.000x0.065 tube for welding into a complete replacement shaft. Confirm tube wall thickness compatibility with your specific shaft design before welding.

Replacement and Fitment Guidance

• Match the bolt circle diameter and bolt hole size precisely to the OEM specification -- even 1mm variation in bolt circle leads to indexed load concentration
• Inspect the mating flange bolts and replace if any show thread corrosion or shank fatigue
• Torque bolts to specification in a star pattern for even load distribution across all prongs
• Check for vibration after installation -- prong adapters that are not centered precisely will introduce first-order vibration at driveshaft speed

Source from Universal Driveshafts

The 1626-780 prong adapter is available for shipment from our driveline parts inventory. We stock a wide selection of bolt circles and tube sizes for European and Korean import driveshaft applications. Contact our team for cross-referencing assistance.