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    Eaton Detroit Locker Automatic Locker | Ford 9in Center Section 31-Spline, 9in Ring Gear | R18703A

    Vendor: Eaton
    Part Number: R18703A
    Regular Price $964.99

    Available to order. In-stock orders typically ship in 1 to 2 business days.

    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 Locker is a 100 percent automatic locking differential that keeps both axle shafts driving at all times, so power still reaches the wheel with grip even when the opposite tire lifts off the ground. It is built for maximum strength and traction, takes no driver input, and needs no routine maintenance. This unit is configured for the Ford 9in center section axle.

    • Type: Automatic locking differential (Detroit Locker)
    • Axle: Ford 9in center section
    • Ring gear diameter: 9in
    • Axle shaft diameter: 1.32in
    • Spline count: 31-spline
    • Gear ratio: All except 2.72
    • Part number: R18703A

    Axle Fitment

    • This unit is built for the Ford 9in center section axle (31-spline, 9in ring gear, All except 2.72). It is found in Ford 9in dropout / center-section builds, popular in circle-track and hot-rod axles. Confirm your axle and spline count.

    FAQ

    What does the Eaton Detroit Locker do?

    It is a 100 percent automatic locker that keeps both wheels driving for maximum traction.

    Which axle and spline count does part number R18703A fit?

    It fits the Ford 9in center section axle, 31-spline, 9in ring gear, All except 2.72. Confirm your axle and spline count before ordering.

    Is the Detroit Locker street friendly?

    It is a full automatic locker built for maximum traction and strength. It can exhibit normal locker characteristics on the street, so it is chosen where traction is the priority.

    Does it require special additives or maintenance?

    No routine maintenance and no friction-modifier additive are required.

    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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