Detroit Speed - Archived Differential - 070880DS

The Detroit Speed FN988 Standard Case, Bare, provides the foundation for builders who demand both performance and precision. Cast from high strength nodular iron, and featuring forged bearing caps, this housing delivers exceptional strength, and easy service access. Designed for gear builders and enthusiasts assembling custom driveline configurations, it’s the perfect starting point for a high-performance build that balances durability and refinement. ENGINEERED FOR STRENGTH The FN988 Standard Case embodies Detroit Speed’s commitment to elite-level engineering and performance. The housing’s rigid structure minimizes flex under high load while supporting the quiet, smooth performance the 8.8” gear set is known for. Internal oil channels ensure lubrication of the pinion bearings, improving the durability and performance of the assembly. TRUSTED BY TOP INDUSTRY PROFESSIONALS Designed with professional builders and advanced enthusiasts in mind, the FN988 is trusted and used by many of the highest quality build shops in the country. The quiet, efficient operation offers a level of refinement consistent with the high quality builds across the country. Its precise geometry, housing alignment, and superior materials make it the perfect foundation for Pro Touring and performance builds requiring exact tolerances and modern driveline control. BUILT FOR CUSTOMIZATION Detroit Speed designed the FN988 Standard Case to utilize readily available 8.8” internal components. Delivered as an unassembled case, it allows complete customization of internal components including gears, differential, and yoke. The dropout 8.8 configuration simplifies both installation and maintenance.

Note: Fitment Notes Fits: Any 9-inch housing: Center Section: 8.8 Dropout (Ford 9-inch style): Configuration: Bare case only (no gears or internal components included): Install Type: Intended for professional assembly: Compatibility: 8.8 ring and pinion / differentials: Ideal For: Pro Touring, street performance, and high-power custom rear-end builds