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    Sale!

    Eaton Detroit Truetrac Helical Limited-Slip Differential | Dana 30 Front 27-Spline, 7.2in Ring Gear | 912A584

    Vendor: Eaton
    Part Number: 912A584
    Save $83.92
    Sale Price $964.99 Regular Price $1,048.91

    In Stock

    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
    Fast Fulfillment: In-stock orders typically ship within 1 to 2 business days.
    Free Shipping on Orders Over $99 | Excludes freight shipments
    International Shipping Available: email sales@berryperformancesales.com for a quote.
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    The Eaton Detroit Truetrac is a helical gear-driven limited-slip differential that automatically sends torque to the wheel with the most traction, sharpening handling and drivability without the on/off behavior of a locker. It operates smoothly and quietly, needs no maintenance, and suits street, tow, and trail use.

    • Type: Helical gear limited-slip differential
    • Axle: Dana 30 front
    • Ring gear: 7.2in
    • Axle shaft diameter: 1.16in
    • Spline count: 27
    • Gear ratio: 3.54 and down
    • Part number: 912A584

    Axle Fitment

    • Fits the Dana 30 front axle, 27-spline, 7.2in ring gear, 3.54 and down ratios, used across Jeep Cherokee, Wrangler, and JK and Chrysler/Dodge trucks. Confirm your axle and spline count.

    FAQ

    What is a Detroit Truetrac?

    It is a helical gear limited-slip differential that automatically biases torque to the wheel with the most traction, with no clutches to wear and no maintenance.

    Which axle does 912A584 fit?

    The Dana 30 front axle with a 7.2in ring gear and 27-spline axle shafts, in 3.54 and down gear ratios.

    Does it need any special gear ratio?

    This unit is built for 3.54 and down ratios. Confirm your ratio and spline count before ordering.

    Is maintenance required?

    No. The Truetrac operates automatically and needs no routine maintenance.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy

    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy

    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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