DSE GM 12-Bolt Differential Assembly - 3.08 Ratio - 33-Spline TrueTrac - 91-10011
Build your GM 12-bolt rear axle around a 33-spline limited-slip combination with the Detroit Speed 91-10011. This differential assembly pairs a 3.08 final-drive ratio with a 33-spline TrueTrac, providing a performance-oriented solution for compatible GM 12-bolt builds that require the added spline count while retaining numerically lower 3.08 gearing. It is a strong match for properly planned street, restomod and Pro Touring combinations where gearing, axle compatibility and dependable limited-slip operation all matter.
The TrueTrac uses a gear-driven limited-slip design rather than conventional friction clutch packs, providing automatic torque biasing as driving conditions change. With its 33-spline configuration, the 91-10011 is intended for compatible 33-spline axle setups. The 3.08 ratio should be evaluated as part of the complete drivetrain combination, including transmission ratios, tire diameter, engine characteristics and intended vehicle use.
Specifications
- Part Number: 91-10011
- Manufacturer: Detroit Speed
- Rear Axle Type: GM 12-Bolt
- Gear Ratio: 3.08
- 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
- 3.08 final-drive ratio
- 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 numerically lower 3.08 gearing
Fitment
- GM 12-Bolt Rear Axle Applications
- Applications Using Compatible 33-Spline Axles
Fitment Notes
Detroit Speed identifies part number 91-10011 as a GM 12-bolt assembly with a 3.08 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 3.08 final-drive ratio is appropriate for your combination.
FAQs
What gear ratio does the DSE 91-10011 use?
The Detroit Speed 91-10011 uses a 3.08 final-drive ratio. The suitability of this ratio depends on the complete drivetrain combination, including transmission gearing and tire diameter.
What axle spline count does the DSE 91-10011 require?
Detroit Speed specifies the 91-10011 as a 33-spline configuration. It should be used with compatible 33-spline axles in an appropriate GM 12-bolt rear axle setup.
What type of differential is used in the DSE 91-10011?
The 91-10011 uses a TrueTrac gear-driven limited-slip differential. Its design provides limited-slip operation without the conventional friction clutch packs used in traditional clutch-type differentials.
Get Your Detroit Speed Components from Beefcake Racing
Build your GM 12-bolt rear axle with the Detroit Speed 91-10011 featuring 3.08 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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