DSE GM 12-Bolt Differential Assembly - 3.55 Ratio - 33-Spline Eaton TrueTrac - 1350 Yoke - 91-10012
Build your GM 12-bolt rear end with a serious performance combination using the Detroit Speed 91-10012 Differential Assembly. This complete rear gear assembly pairs a versatile 3.55 gear ratio with a 33-spline Eaton TrueTrac differential and 1350 high-performance pinion yoke with U-bolts. The combination delivers the higher 33-spline axle capacity many performance builds require while retaining a well-rounded 3.55 final-drive ratio suited to properly matched street, restomod and Pro Touring drivetrains.
Detroit Speed builds its GM 12-bolt rear gear assemblies using championship-winning build procedures and close attention to detail. All parts are individually inspected and hand deburred for quality assurance. The 91-10012 is assembled with 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, U-joint bolt kit and required hardware round out a carefully specified GM 12-bolt differential package.
Specifications
- Part Number: 91-10012
- Manufacturer: Detroit Speed
- Product Type: Differential Assembly
- Carrier Style: GM 12-Bolt
- Gear Ratio: 3.55
- Axle Shaft Spline Count: 33-Spline
- Differential: Eaton TrueTrac
- Yoke Style: 1350
- Yoke: High-Performance Pinion Yoke
- Yoke 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
- Performance-focused GM 12-bolt differential assembly
- 3.55 final-drive ratio for a versatile performance drivetrain combination
- 33-spline Eaton TrueTrac differential
- Gear-driven TrueTrac limited-slip operation without conventional friction clutch packs
- 1350 high-performance 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 individually inspected and hand deburred for quality assurance
Fitment
- GM 12-Bolt Rear Axle Applications
- Applications Using Compatible 33-Spline Axles
- Applications Using a Compatible 1350-Series Driveline Connection
Fitment Notes
Detroit Speed specifies part number 91-10012 as a GM 12-bolt differential assembly with a 3.55 gear ratio, 33-spline Eaton TrueTrac and 1350 high-performance pinion yoke with U-bolts. Confirm rear axle type, axle spline count and driveline compatibility for your specific build before ordering. Detroit Speed also offers REM isotropic surface finishing for the ring and pinion as an additional option to increase performance, durability and trouble-free operation.
FAQs
What gear ratio and differential does the DSE 91-10012 use?
The Detroit Speed 91-10012 combines a 3.55 gear ratio with a 33-spline Eaton TrueTrac differential. Final-drive suitability should be evaluated with your transmission gearing, tire diameter and intended vehicle use.
What yoke is included with the DSE 91-10012?
Detroit Speed equips the 91-10012 with a 1350 high-performance pinion yoke with U-bolts. A U-joint bolt kit is also included.
What components are included in the DSE 91-10012?
The assembly includes an Eaton TrueTrac, ARP ring gear bolts, premium ring and pinion, premium pinion seal, solid pinion preload spacer, TIMKEN bearings, 1350 high-performance pinion yoke and U-joint bolt kit. Detroit Speed 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 91-10012 Differential Assembly featuring 3.55 gearing, a 33-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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