DSE GM 12-Bolt Differential Assembly - 3.73 Ratio - 33-Spline TrueTrac - 91-10013
Build your GM 12-bolt rear axle around a performance-focused combination of gearing and limited-slip traction with the Detroit Speed 91-10013. This differential assembly combines a 3.73 final-drive ratio with a 33-spline TrueTrac, making it a strong choice for compatible performance street, restomod and Pro Touring builds that require a 33-spline configuration. The 3.73 gearing provides a performance-oriented final-drive ratio that can work especially well when properly matched to the transmission ratios, tire diameter and powerband of the vehicle.
The TrueTrac uses a gear-driven limited-slip design rather than conventional friction clutch packs, providing automatic torque biasing as traction conditions change. Combined with the 33-spline configuration, the 91-10013 gives builders a purpose-selected GM 12-bolt differential solution for applications requiring this specific spline count and 3.73 gearing. As with any rear axle combination, gear ratio and spline compatibility should be confirmed against the complete drivetrain before ordering.
Specifications
- Part Number: 91-10013
- Manufacturer: Detroit Speed
- Rear Axle Type: GM 12-Bolt
- Gear Ratio: 3.73
- Axle Spline Count: 33-Spline
- Differential: TrueTrac
- Differential Type: Gear-Driven Limited Slip
- Emission Code: 4
Features
- Designed for compatible GM 12-bolt rear axle applications
- 3.73 final-drive ratio for performance-oriented drivetrain combinations
- 33-spline configuration for use with compatible 33-spline axles
- TrueTrac limited-slip differential
- Gear-driven limited-slip operation
- No conventional friction clutch packs inside the TrueTrac differential
- Combines 33-spline axle compatibility with performance-focused 3.73 gearing
Fitment
- GM 12-Bolt Rear Axle Applications
- Applications Using Compatible 33-Spline Axles
Fitment Notes
Detroit Speed identifies part number 91-10013 as a GM 12-bolt assembly with a 3.73 gear ratio, 33-spline configuration and TrueTrac differential. Confirm rear axle type and axle spline count before ordering. Transmission gearing, tire diameter, engine operating range and intended vehicle use should also be considered when determining whether the 3.73 final-drive ratio is appropriate for your combination.
FAQs
What gear ratio does the DSE 91-10013 use?
The Detroit Speed 91-10013 uses a 3.73 final-drive ratio. The suitability of this ratio depends on the complete drivetrain combination, including transmission gearing, tire diameter and intended vehicle use.
What axle spline count does the DSE 91-10013 use?
Detroit Speed specifies the 91-10013 as a 33-spline configuration. Verify that your GM 12-bolt rear axle uses compatible 33-spline axles before ordering.
What type of differential is used in the DSE 91-10013?
The 91-10013 uses a TrueTrac gear-driven limited-slip differential. The TrueTrac design operates without the conventional friction clutch packs used in traditional clutch-type limited-slip differentials.
Get Your Detroit Speed Components from Beefcake Racing
Build your GM 12-bolt rear axle with the Detroit Speed 91-10013 featuring 3.73 gearing and a 33-spline TrueTrac from Beefcake Racing. For help confirming rear axle, spline or gearing compatibility for your build, email sales@beefcakeracing.com or call 1-855-827-7223.
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