Drive Flange for Billet GN Hub

The Drive Flange for Billet GN Hub from Diversified Machine is a critical driveline component engineered for Buick Grand National and Turbo Regal platform restorations and high-performance builds. This 24-spline steel flange bridges your transmission output shaft to the rear axle assembly, serving as the foundation for reliable power transfer in classic muscle car applications. Whether you're rebuilding a stock Grand National or upgrading to a modern turbo setup, this drive flange ensures proper engagement with both 5x5 and 5x4.75 wheel bolt patterns, maintaining compatibility across generations of Buick's legendary lineage.

Constructed from heavy-duty steel and finished in durable black paint, the drive flange is designed to handle the rotational forces and torque loads inherent to Grand National hub assemblies. The 24-spline interface provides secure, backlash-free connection to your transmission's output shaft, critical for eliminating drivetrain clunk and ensuring smooth power delivery under acceleration or load. Measuring 7.5 inches overall with a compact 2.25-inch hub interface, this component integrates seamlessly into the 1-3/4 inch Grand National hub configuration, maintaining OEM geometry while supporting both stock and modified powerplant applications. The precision steel construction resists deflection under sustained horsepower, making it suitable for turbocharged builds or upgraded naturally aspirated performance packages.

Mechanics and enthusiasts undertaking Grand National restorations or driveline repairs will appreciate this flange's straightforward installation and direct fitment to OEM 1-3/4 inch hubs. It's particularly valuable when refreshing aging or damaged flanges in high-mileage classics, or when transitioning to modern differentials and axle assemblies that require compatible spline counts. The dual bolt pattern support ensures compatibility whether your build retains original 5x5 wheels or adopts the slightly narrower 5x4.75 pattern, offering flexibility across restoration and customization scenarios. For anyone serious about driveline reliability in their Grand National project, this Diversified Machine drive flange is an essential wear item and performance upgrade.