DSE GM 12-Bolt Center Section - 3.08 Ratio - 30-Spline Eaton Truetrac - 91-10001
Build your GM 12-bolt rear end around a proven limited-slip combination with the Detroit Speed 91-10001. This assembly combines a 3.08 gear ratio with a 30-spline Eaton Truetrac differential, giving performance street, restomod and Pro Touring builds a gear-driven limited-slip setup without relying on conventional friction clutch packs. The 3.08 final-drive ratio also gives builders a numerically lower gearing option for combinations where overall transmission gearing, tire diameter and highway use are important considerations.
At the center of the 91-10001 is the Eaton Truetrac, a gear-driven limited-slip differential engineered to automatically bias torque without the wearable clutch packs found in traditional clutch-type limited-slip designs. Combined with its 30-spline configuration and 3.08 gearing, this Detroit Speed GM 12-bolt assembly provides a straightforward performance upgrade for compatible rear axle builds where dependable limited-slip operation and the correct final-drive ratio are priorities.
Specifications
- Part Number: 91-10001
- Manufacturer: Detroit Speed
- Rear End Type: GM 12-Bolt
- Gear Ratio: 3.08
- Axle Spline Count: 30-Spline
- Differential: Eaton Truetrac
- Differential Type: Gear-Driven Limited Slip
Features
- Designed for compatible GM 12-bolt rear axle applications
- 3.08 final-drive ratio provides a numerically lower gearing option for appropriately matched performance street builds
- 30-spline configuration for use with compatible 30-spline axles
- Eaton Truetrac limited-slip differential
- Gear-driven limited-slip operation automatically biases torque
- No conventional friction clutch packs inside the Truetrac differential
- Well suited to performance street, restomod and Pro Touring GM 12-bolt rear axle combinations requiring 3.08 gearing
Fitment
- GM 12-Bolt Rear Axle Applications
- Applications Using Compatible 30-Spline Axles
Fitment Notes
Detroit Speed identifies part number 91-10001 as a GM 12-bolt assembly with a 3.08 gear ratio, 30-spline configuration and Eaton Truetrac differential. Confirm rear axle type, axle spline count and all other compatibility requirements for your specific vehicle before ordering. Transmission gearing, tire diameter 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 91-10001 use?
The Detroit Speed 91-10001 uses a 3.08 gear ratio. Because final-drive ratio works together with transmission gearing and tire diameter, those factors should be considered when determining whether 3.08 gearing is right for your build.
What differential is used in the DSE 91-10001?
The 91-10001 uses an Eaton Truetrac limited-slip differential. The Truetrac uses a gear-driven design to automatically bias torque without conventional friction clutch packs.
What axle spline count is required for the DSE 91-10001?
Detroit Speed identifies the 91-10001 as a 30-spline GM 12-bolt configuration. Verify that your rear axle uses compatible 30-spline axles before ordering.
Get Your Detroit Speed Components from Beefcake Racing
Upgrade your GM 12-bolt rear end with the Detroit Speed 91-10001 featuring 3.08 gearing and a 30-spline Eaton Truetrac from Beefcake Racing. For help confirming rear axle, gearing or spline compatibility for your build, email sales@beefcakeracing.com or call 1-855-827-7223.
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