DSE Ford 9-Inch N-Series Center Section - 3.70 Ratio - 31-Spline Eaton TrueTrac - 1350 Yoke - 90-20020
Step up your Ford 9-inch rear end with the Detroit Speed 90-20020 N-Series Center Section, a performance-built third member combining a 3.70 gear ratio, 31-spline Eaton TrueTrac and DSE 1350 Ultra Performance yoke. The 3.70 gearing gives performance street, restomod and Pro Touring builds a strong final-drive option, while the TrueTrac provides limited-slip traction through a proven gear-driven design. At the heart of the assembly is a genuine Ford SVO nodular iron H case with 3.250-inch bearings and chromoly bearing caps.
Detroit Speed equips the 90-20020 with premium hardware throughout the assembly, including a Ford Daytona pinion support, ARP pinion support bolts, safety-wired ARP ring gear bolts, premium ring and pinion, DSE solid pinion preload spacer and TIMKEN bearings. The DSE 1350 Ultra Performance yoke is paired with a U-joint strap kit and 12-point bolts for a performance-ready driveline connection. Detroit Speed also individually inspects and hand deburrs the components used in its rear gear builds, putting attention to detail into the assembly before it reaches your project.
Specifications
- Part Number: 90-20020
- 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: 3.70
- Axle Shaft Spline Count: 31-Spline
- Differential: Eaton TrueTrac
- Yoke: DSE 1350 Ultra Performance
- Yoke Style: 1350
- Pinion Support: Ford Daytona
- Pinion Support Style: Daytona
- Pinion Support Bolts: ARP
- Ring Gear Bolts: ARP, Safety Wired
- Ring and Pinion: Premium
- Pinion Preload: DSE Solid Spacer
- Bearings: TIMKEN
- Pinion Seal: Ford
- Daytona Pinion Support D O-Ring: Included
- Oil Slinger: Included
- U-Joint Strap Kit with 12-Point Bolts: Included
- Emission Code: 4
Features
- N-Series Ford 9-inch center section engineered for high-performance rear axle builds
- 3.70 gear ratio provides performance-focused gearing for compatible street and Pro Touring combinations
- 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
- DSE 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
- DSE 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 90-20020 as an N-Series Ford 9-inch differential assembly with a 3.70 gear ratio, 31-spline Eaton TrueTrac and DSE 1350 Ultra Performance yoke. Confirm axle spline count, driveshaft and U-joint compatibility, and all other rear axle requirements for your specific build before ordering. Transmission gearing and tire diameter should also be considered when determining whether the 3.70 final-drive ratio is appropriate for your combination.
FAQs
What gear ratio and differential does the DSE 90-20020 use?
The Detroit Speed 90-20020 combines a 3.70 gear ratio with a 31-spline Eaton TrueTrac. The TrueTrac uses a gear-driven limited-slip design without conventional friction clutch packs.
What case is used for the DSE 90-20020 N-Series center section?
Detroit Speed builds the 90-20020 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 is included with the DSE 90-20020?
The 90-20020 includes a DSE 1350 Ultra Performance yoke along with a U-joint strap kit and 12-point bolts. Verify that the driveshaft and U-joint configuration in your vehicle is compatible with a 1350-series connection.
Get Your Detroit Speed Components from Beefcake Racing
Build your Ford 9-inch rear end with the Detroit Speed 90-20020 N-Series Center Section featuring 3.70 gearing, a 31-spline Eaton TrueTrac and DSE 1350 Ultra Performance yoke from Beefcake Racing. For help confirming rear axle, gearing or driveline compatibility for your build, email sales@beefcakeracing.com or call 1-855-827-7223.
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