DSE GM 12-Bolt Differential Assembly - 3.73 Ratio - 30-Spline Eaton TrueTrac - 1350 Yoke - 91-10003
Build your GM 12-bolt rear end with a performance-focused combination of gearing, traction and proven components using the Detroit Speed 91-10003 Differential Assembly. This complete rear gear assembly pairs a 3.73 gear ratio with a 30-spline Eaton TrueTrac differential and 1350 high-performance pinion yoke with U-bolts. The 3.73 final-drive ratio is a popular performance-oriented choice for properly matched street, restomod and Pro Touring combinations, while the TrueTrac delivers smooth gear-driven limited-slip operation to help put power to the pavement.
Detroit Speed builds its GM 12-bolt rear gear assemblies using championship-winning build procedures and close attention to detail. Every component is individually inspected and hand deburred for quality assurance. The 91-10003 uses premium components including ARP ring gear bolts, a premium ring and pinion, premium pinion seal, solid pinion preload spacer and TIMKEN bearings. A high-performance 1350 pinion yoke and U-joint bolt kit complete the driveline connection, and Detroit Speed includes the required hardware with the assembly.
Specifications
- Part Number: 91-10003
- Manufacturer: Detroit Speed
- Product Type: Differential Assembly
- Carrier Style: GM 12-Bolt
- Gear Ratio: 3.73
- Axle Shaft Spline Count: 30-Spline
- Differential: Eaton TrueTrac
- Differential Type: Gear-Driven Limited Slip
- Yoke Style: 1350
- Yoke: High-Performance Pinion Yoke
- U-Joint Retention: U-Bolts
- Ring Gear Bolts: ARP
- Ring and Pinion: Premium
- Pinion Seal: Premium
- Pinion Preload: Solid Spacer
- Bearings: TIMKEN
- U-Joint Bolt Kit: Included
- Required Hardware: Included
- Emission Code: 4
Features
- Complete performance-oriented GM 12-bolt differential assembly
- 3.73 gear ratio provides performance-focused final-drive gearing for compatible builds
- 30-spline Eaton TrueTrac differential
- Gear-driven TrueTrac design provides automatic limited-slip operation without conventional friction clutch packs
- High-performance 1350 pinion yoke with U-bolts
- ARP ring gear bolts
- Premium ring and pinion
- Premium pinion seal
- Solid pinion preload spacer
- TIMKEN bearings
- U-joint bolt kit included
- All required hardware included
- Components are individually inspected and hand deburred by Detroit Speed for quality assurance
Fitment
- GM 12-Bolt Rear Axle Applications
- Applications Using Compatible 30-Spline Axles
- Applications Using a Compatible 1350-Series Driveline Connection
Fitment Notes
Detroit Speed specifies part number 91-10003 as a GM 12-bolt differential assembly with a 3.73 gear ratio, 30-spline Eaton TrueTrac and 1350 high-performance pinion yoke with U-bolts. Confirm rear axle type, axle spline count, driveshaft and U-joint compatibility for your specific build before ordering. Transmission gearing, tire diameter and intended vehicle use should also be considered when selecting a 3.73 final-drive ratio. Detroit Speed offers REM isotropic surface finishing for the ring and pinion as an additional option.
FAQs
What gear ratio and differential does the DSE 91-10003 use?
The Detroit Speed 91-10003 combines a 3.73 gear ratio with a 30-spline Eaton TrueTrac differential. The TrueTrac uses a gear-driven limited-slip design without conventional friction clutch packs.
What yoke is included with the DSE 91-10003?
Detroit Speed equips the 91-10003 with a high-performance 1350 pinion yoke with U-bolts. A U-joint bolt kit is also included with the assembly.
What components are included in the DSE 91-10003?
Detroit Speed specifies ARP ring gear bolts, a premium ring and pinion, premium pinion seal, solid pinion preload spacer, TIMKEN bearings, 1350 high-performance pinion yoke and U-joint bolt kit. The manufacturer states that all required hardware is included.
Get Your Detroit Speed Components from Beefcake Racing
Build your GM 12-bolt rear end with the Detroit Speed 91-10003 Differential Assembly featuring 3.73 gearing, a 30-spline Eaton TrueTrac and 1350 high-performance pinion 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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