DSE Ford 9-Inch N-Series Center Section - 3.89 Ratio - 31-Spline Eaton TrueTrac - GFX 1350 Yoke - 90-20025
Put a proven combination of aggressive gearing, limited-slip traction and heavy-duty driveline hardware into your Ford 9-inch with the Detroit Speed 90-20025 N-Series Center Section. This assembled third member combines a 3.89 gear ratio with a 31-spline Eaton TrueTrac and GFX 1350 Ultra Performance yoke. At the heart of the assembly is a genuine Ford SVO nodular iron H case with 3.250-inch bearings and chromoly bearing caps, giving performance street, restomod and Pro Touring builds a serious foundation for putting power to the pavement.
Detroit Speed builds the 90-20025 with premium components throughout, including a Ford Daytona pinion support, ARP pinion support bolts, safety-wired ARP ring gear bolts, premium ring and pinion, solid pinion preload spacer and TIMKEN bearings. The Eaton TrueTrac provides gear-driven limited-slip operation without conventional friction clutch packs, while the GFX 1350 Ultra Performance yoke comes with a U-joint strap kit and 12-point bolts. Detroit Speed also individually inspects and hand deburrs the components used in its rear gear assemblies as part of its quality-control process.
Specifications
- Part Number: 90-20025
- Manufacturer: Detroit Speed
- Product Type: Differential Assembly / Ford 9-Inch Center Section
- Series: N-Series (SVO)
- Carrier Style: Ford 9-Inch
- Case: Ford SVO Nodular Iron H Case
- Case Material: Nodular Iron
- Case Bearing Size: 3.250 Inches
- Bearing Caps: Chromoly
- Gear Ratio: 3.89
- Axle Shaft Spline Count: 31-Spline
- Differential: Eaton TrueTrac
- Yoke: GFX 1350 Ultra Performance
- Yoke Style: 1350
- U-Joint Retention: Strap Kit with 12-Point Bolts
- Pinion Support: Ford Daytona
- Pinion Support Style: Daytona
- Pinion Support Bolts: ARP
- Ring Gear Bolts: ARP, Safety Wired
- Ring and Pinion: Premium
- Pinion Preload: Solid Spacer
- Bearings: TIMKEN
- Pinion Seal: Ford
- Daytona Pinion Support D O-Ring: Included
- Oil Slinger: Included
- Emission Code: 4
Features
- N-Series Ford 9-inch center section built for high-performance rear axle applications
- 3.89 gear ratio provides performance-oriented final-drive gearing
- 31-spline Eaton TrueTrac provides gear-driven limited-slip operation
- Genuine Ford SVO nodular iron H case made in the USA with Ford tooling
- 3.250-inch case bearings and chromoly bearing caps provide a strong foundation for the differential assembly
- GFX 1350 Ultra Performance yoke for compatible 1350-series driveline applications
- U-joint strap kit with 12-point bolts included
- Ford Daytona pinion support
- ARP pinion support bolts
- Safety-wired ARP ring gear bolts
- Premium ring and pinion
- Solid pinion preload spacer
- TIMKEN bearings
- Ford pinion seal
- Daytona pinion support D O-ring and oil slinger included
- Components are individually inspected and hand deburred by Detroit Speed for quality assurance
Fitment
- Ford 9-Inch Rear Axle Applications
- Applications Using Compatible 31-Spline Axles
- Applications Using a Compatible 1350-Series Driveline Connection
Fitment Notes
Detroit Speed specifies part number 90-20025 as an N-Series Ford 9-inch differential assembly with a 3.89 gear ratio, 31-spline Eaton TrueTrac and GFX 1350 Ultra Performance yoke. Confirm axle spline count, driveshaft and U-joint compatibility, and other rear axle requirements for your specific build before ordering. Detroit Speed also offers REM isotropic surface finishing as an additional option for this center section.
FAQs
What gear ratio and differential does the DSE 90-20025 use?
The Detroit Speed 90-20025 combines a 3.89 gear ratio with a 31-spline Eaton TrueTrac. The TrueTrac uses a gear-driven limited-slip design without conventional friction clutch packs.
What case does the DSE 90-20025 N-Series center section use?
Detroit Speed builds the 90-20025 around a genuine Ford SVO nodular iron H case made in the USA with Ford tooling. The case uses 3.250-inch bearings and chromoly bearing caps.
What yoke comes with the DSE 90-20025?
The 90-20025 uses a GFX 1350 Ultra Performance yoke and includes a U-joint strap kit with 12-point bolts. Confirm that your driveshaft and U-joint configuration is compatible with a 1350-series connection before ordering.
Get Your Detroit Speed Components from Beefcake Racing
Build your Ford 9-inch rear end with the Detroit Speed 90-20025 N-Series Center Section featuring 3.89 gearing, a 31-spline Eaton TrueTrac and GFX 1350 Ultra Performance yoke from Beefcake Racing. For help confirming gearing, axle or driveline compatibility for your build, email sales@beefcakeracing.com or call 1-855-827-7223.
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