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    Sale!

    Eaton Detroit Truetrac Helical Limited-Slip Differential | Dana 44 30-Spline, 8.5in Ring Gear | 913A589

    Vendor: Eaton
    Part Number: 913A589
    Save $73.92
    Sale Price $679.99 Regular Price $753.91

    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 makes the most of available traction and sharpens handling and drivability. It works smoothly and automatically, needs no maintenance, and suits street, tow, and trail use without the on and off behavior of a locker. This unit fits the Dana 44 axle with 30-spline shafts and 3.73 and down ratios.

    • Type: Helical gear limited-slip differential
    • Axle: Dana 44
    • Ring gear diameter: 8.5in
    • Axle shaft diameter: 1.31in
    • Spline count: 30
    • Gear ratio: 3.73 and down
    • Part number: 913A589

    Axle Fitment

    • Fits the Dana 44 axle, 30-spline, 3.73 and down ratios, found in 1970-2018 Jeep including JK and Chrysler and Dodge trucks. Confirm your axle and spline count.

    FAQ

    What axle does the 913A589 fit?

    It is built for the Dana 44 axle with 30-spline shafts.

    What ratios does it cover?

    It works with 3.73 and down (numerically lower) ratios.

    Which vehicles use this Dana 44?

    It is common on 1970-2018 Jeep including JK and Chrysler and Dodge trucks. Confirm your axle first.

    Is it maintenance free?

    Yes. The helical Truetrac is automatic and needs no 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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