Viton Seal for DMI 2-7/8in Smart Tube

The Viton Seal for DMI 2-7/8in Smart Tube is a precision hub bearing seal engineered for rear axle applications in performance and heavy-duty vehicles. This inner lip seal is designed for technicians and enthusiasts who demand OEM-quality sealing in critical drivetrain components. Whether you're rebuilding a differential, servicing a rear axle assembly, or restoring a vehicle after suspension work, this seal prevents contamination and fluid loss at the bearing interface where reliability is non-negotiable.

Manufactured by Diversified Machine with a Viton elastomer construction, the seal delivers superior chemical resistance and thermal stability compared to standard Nitrile alternatives. The 4-inch outer diameter and 3.32-inch inner diameter are precisely machined to fit the DMI Smart Tube bearing assembly, with a 0.372-inch thickness that ensures proper contact pressure without over-compressing the seal lip. The steel ring provides structural integrity and prevents extrusion, while the single-lip design creates a dynamic seal that adapts to bearing runout while maintaining low drag and minimal heat generation during extended driving.

This seal is ideal for rear axle rebuilds on trucks, performance cars, and off-road vehicles using Diversified Machine hub components. Installation requires proper bearing preload setup and clean assembly conditions—contamination during installation will compromise seal life. The compact 0.13-pound weight and 4.3 x 5.3-inch envelope make handling straightforward, though professional installation with a bearing driver is recommended to avoid lip damage. When replacing worn or leaking seals, always inspect the bearing seat for scoring and verify runout before pressing the new seal into place.