Detroit Speed Bare Center Section FN988 Torque Arm Case 31 Spline 070881DS

The Detroit Speed FN988 Torque Arm 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. Torque Arm mounting greatly improves packaging in 3^rd and 4^th Gen F-Body builds.

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.

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.
• Torque Arm Mouting – Integral mounting for 82-02 F-Body Torque Arm.
• 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; 82-02 F-Body (Chevrolet Camaro / Pontiac Firebird) Torque Arms
• 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