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.
FEATURES & BENEFITS
- 8.8 Dropout Center Section Design – Direct fit into Ford 9” housing allows easy service without disturbing rear axle setup. Threaded jack bolts in mounting flange to ease removal from housing.
- Bare Case Configuration – Provides full customization for gear ratio, differential, and bearing options. Utilizes standard 8.8 components for vast build options.
- Quiet Operation – 8.8 gear sets for quiet efficient operation.
- High Strength Construction –– Nodular Iron Case, with Forged Steel Bearing Caps.
- Improved Lubrication – Internal Oil channels ensure lubrication at critical areas.
- High Torque Capacity – Built to handle the power of modern engine builds.
- Detroit Speed Engineering Quality – Designed, tested, and manufactured for premium fit, finish, and performance.
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
Specifications
- ManufacturerDetroit Speed
- Carrier StyleFord 8.8-inch
- Case MaterialNodular Iron
- Case SeriesFN988
- Emission Code4
- Gear RatioNone
- Product TypeBare Center Section
- Yoke Style1350
- Axle Shaft Spline Quantity31
- Universal 9" Center Section?Yes
- Application Specific?No
