DSE Assembled Center Section FN988 Torque Arm - 3.73 Ratio - 31-Spline Truetrac - 1982-2002 Camaro / Firebird - 070881-373DS
Give your third- or fourth-generation F-Body a rear differential built for modern power with the Detroit Speed FN988 Torque Arm Assembled Center Section. Part number 070881-373DS combines a 3.73 gear ratio, 31-spline Truetrac differential, integral torque arm mount, and heavy-duty 1350-series yoke in an application-specific package for 1982-2002 Chevrolet Camaro and Pontiac Firebird builds using a compatible 9-inch axle housing. By packaging the quiet, efficient Ford 8.8-inch gearset into a dropout center section designed for a 9-inch-style housing, the FN988 delivers the strength, serviceability, and refinement serious Pro Touring and high-performance F-Body builds demand.
Detroit Speed engineers the FN988 Torque Arm center section around a high-strength nodular iron case machined to precise tolerances and reinforced with forged steel bearing caps for high-horsepower reliability. The integral torque arm mount eliminates the additional brackets commonly required with 9-inch housing conversions, helping solve the tight packaging challenges found under third- and fourth-generation F-Bodies. This fully assembled 070881-373DS configuration includes a 31-spline Truetrac differential, Ford Racing gearset, high-quality bearings, and a heavy-duty 1350-series yoke. This specific 3.73-ratio version uses standard gears and is not REM polished.
Specifications
- Part Number: 070881-373DS
- Product Type: Differential Assembly
- Case Series: FN988 Torque Arm
- Gear Ratio: 3.73
- Differential: 31-Spline Truetrac
- Axle Shaft Spline Quantity: 31
- Carrier Style: Ford 8.8-inch
- Case Material: Nodular Iron
- Bearing Caps: Forged Steel
- Yoke Style: 1350-Series
- Torque Arm Mount: Integral
- REM Polished: No
- Universal 9-inch Center Section: No
- Application Specific: Yes
Features
- FN988 Torque Arm center section engineered for third- and fourth-generation GM F-Body applications
- 3.73 gear ratio for performance-oriented drivetrain combinations
- 31-spline Truetrac differential delivers smooth, predictable power distribution and improved traction
- Ford 8.8-inch gearset provides quiet and efficient operation
- Dropout center section installs into compatible 9-inch axle housings
- Integral torque arm mount eliminates additional brackets commonly required with 9-inch housing conversions
- High-strength nodular iron case machined to precise tolerances
- Forged steel bearing caps provide added strength for high-horsepower applications
- Ford Racing gearset
- High-quality bearings
- Heavy-duty 1350-series yoke provides durability for high-torque applications
- Dropout design simplifies center section installation and service
- Eliminates C-clip axles when installed with the appropriate 9-inch housing configuration
- Precision assembled to Detroit Speed standards for performance, reliability, and fit
- Designed for Pro Touring, high-performance street, and competition builds
Fitment
- 1982 Chevrolet Camaro
- 1982 Pontiac Firebird
- 1983 Chevrolet Camaro
- 1983 Pontiac Firebird
- 1984 Chevrolet Camaro
- 1984 Pontiac Firebird
- 1985 Chevrolet Camaro
- 1985 Pontiac Firebird
- 1986 Chevrolet Camaro
- 1986 Pontiac Firebird
- 1987 Chevrolet Camaro
- 1987 Pontiac Firebird
- 1988 Chevrolet Camaro
- 1988 Pontiac Firebird
- 1989 Chevrolet Camaro
- 1989 Pontiac Firebird
- 1990 Chevrolet Camaro
- 1990 Pontiac Firebird
- 1991 Chevrolet Camaro
- 1991 Pontiac Firebird
- 1992 Chevrolet Camaro
- 1992 Pontiac Firebird
- 1993 Chevrolet Camaro
- 1993 Pontiac Firebird
- 1994 Chevrolet Camaro
- 1994 Pontiac Firebird
- 1995 Chevrolet Camaro
- 1995 Pontiac Firebird
- 1996 Chevrolet Camaro
- 1996 Pontiac Firebird
- 1997 Chevrolet Camaro
- 1997 Pontiac Firebird
- 1998 Chevrolet Camaro
- 1998 Pontiac Firebird
- 1999 Chevrolet Camaro
- 1999 Pontiac Firebird
- 2000 Chevrolet Camaro
- 2000 Pontiac Firebird
- 2001 Chevrolet Camaro
- 2001 Pontiac Firebird
- 2002 Chevrolet Camaro
- 2002 Pontiac Firebird
Fitment Note: Fits 1982-2002 Chevrolet Camaro and Pontiac Firebird third- and fourth-generation F-Body applications with 9-inch axle housings. Compatible with the Detroit Speed torque arm rear axle housing. This center section is not designed for use with the factory rear axle assembly.
FAQs
What comes with the 070881-373DS FN988 Torque Arm center section?
The assembly comes fully assembled with a 31-spline Truetrac differential, ring and pinion, and 1350-series yoke. This specific version has a 3.73 gear ratio.
What makes the FN988 Torque Arm design different from a conventional 9-inch setup?
The FN988 packages a Ford 8.8-inch gearset into a dropout center section for a 9-inch-style housing and incorporates the torque arm mounting directly into the case. This eliminates additional torque arm brackets while providing quiet, efficient gear operation and strong driveline control.
Is 070881-373DS compatible with the factory Camaro or Firebird rear end?
No. Detroit Speed specifies this center section for 1982-2002 Camaro and Firebird applications with 9-inch axle housings. It is compatible with the Detroit Speed torque arm rear axle housing.
Why Buy from Beefcake Racing?
Beefcake Racing is your source for proven performance drivetrain, suspension, and chassis components for serious street, Pro Touring, autocross, and track builds. If you need help matching the Detroit Speed FN988 center section, axle housing, or supporting rear-end components to your Camaro or Firebird, our experienced team can help you build the right combination. Email sales@beefcakeracing.com or call 1-855-827-7223 for assistance.
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