DSE Assembled Center Section FN988 Torque Arm - 3.08 Ratio - 31-Spline Truetrac - 1982-2002 Camaro / Firebird - 070881-308DS
Upgrade the rear drivetrain in your 1982-2002 Chevrolet Camaro or Pontiac Firebird with the Detroit Speed FN988 Torque Arm Assembled Center Section. Part number 070881-308DS combines a 3.08 gear ratio, 31-spline Truetrac differential, 1350-series yoke, and an integral torque arm mount in a high-strength package engineered specifically for third- and fourth-generation GM F-Body applications using the appropriate 9-inch axle housing. The FN988 combines the dropout-center-section advantages of a 9-inch-style housing with the quieter, more efficient operation of an 8.8-inch gearset.
Built for Pro Touring, high-performance street, and competition applications, the FN988 uses a high-strength nodular iron case with forged steel bearing caps for durability under serious power. The integral torque arm mounting system eliminates the additional brackets commonly required when adapting a 9-inch-style housing to these F-Body applications, helping solve packaging challenges while maintaining a clean, purpose-built installation. Detroit Speed precision-assembles the center section with a 31-spline Truetrac differential, Ford Racing gearset, high-quality bearings, and heavy-duty 1350-series yoke.
Specifications
- Part Number: 070881-308DS
- Product Type: Differential Assembly
- Case Series: FN988 Torque Arm
- Gear Ratio: 3.08
- 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
- Application Specific: Yes
Features
- FN988 Torque Arm center section engineered for third- and fourth-generation GM F-Body applications
- 3.08 gear ratio
- 31-spline Truetrac differential provides smooth and predictable power distribution
- Uses a Ford 8.8-inch gearset for quiet and efficient operation
- Dropout center section installs into the appropriate 9-inch housing
- Integral torque arm mount eliminates the need for additional torque arm brackets on the center section
- High-strength nodular iron case
- Forged steel bearing caps provide added strength for high-horsepower applications
- Ford Racing gearset
- High-quality bearings
- Heavy-duty 1350-series yoke
- Designed for improved packaging in third- and fourth-generation Camaro and Firebird applications
- Precision assembled for performance, durability, and proper 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: Designed for 1982-2002 Camaro and Firebird applications using a 9-inch axle housing and the Detroit Speed torque arm rear axle housing configuration. This center section is not compatible with the factory rear axle assembly.
FAQs
What is included with the 070881-308DS FN988 Torque Arm center section?
The assembly comes fully assembled with a 31-spline Truetrac differential, ring and pinion, and 1350-series yoke. This version uses a 3.08 gear ratio.
What makes the FN988 Torque Arm center section different from a conventional 9-inch setup?
The FN988 combines a dropout-style center section with an 8.8-inch gearset and an integral torque arm mount. The integrated mount eliminates additional torque arm brackets that can create packaging problems in third- and fourth-generation F-Body installations.
Is 070881-308DS compatible with the factory Camaro or Firebird rear end?
No. Detroit Speed specifies this FN988 Torque Arm center section for 9-inch housings in third- and fourth-generation Camaro and Firebird applications and identifies it as compatible with the Detroit Speed torque arm rear axle housing.
Why Buy from Beefcake Racing?
Beefcake Racing is your source for serious performance drivetrain, suspension, and chassis components for street, Pro Touring, autocross, and track builds. If you need help confirming the correct Detroit Speed FN988 components for your Camaro or Firebird, our experienced team can help you put together the right combination. Email sales@beefcakeracing.com or call 1-855-827-7223 for assistance.
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