{"product_id":"adjuster-locks-pr-ford-9-inch","title":"Mark Williams 57906 Differential Adjuster Locks (Pair) — Fits Ford 9in","description":"\u003cdiv style=\"background:#f7f7f7;border-left:4px solid #c00000;padding:14px 18px;margin:0 0 18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;font-size:1.1em;\"\u003eAbout Mark Williams\u003c\/h3\u003e\n\u003cp style=\"margin:0;font-size:0.95em;line-height:1.55;\"\u003eMark Williams engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Mark Williams lineup with fast shipping and expert fitment support — order with confidence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eSecure Your Ford 9-inch Differential Adjusters with Mark Williams\u003c\/h2\u003e\u003cp\u003eMaintain precise gear mesh and prevent unwanted adjuster movement in your high-performance \u003cb\u003eFord 9-inch differential\u003c\/b\u003e with the \u003cb\u003eMark Williams 57906 Differential Adjuster Locks\u003c\/b\u003e. These essential components are designed to provide a positive lock on your differential adjusters, crucial for maintaining optimal backlash and preventing costly damage, especially in demanding racing or aggressive street applications where vibrations and torque loads are extreme.\u003c\/p\u003e\u003ch3\u003eEngineered for Reliability and Durability\u003c\/h3\u003e\u003cp\u003eEach adjuster lock in this Mark Williams kit is precision-machined from robust steel, ensuring exceptional strength and longevity. The cadmium plating offers superior corrosion resistance, protecting against rust and degradation even in harsh operating conditions. This kit includes all necessary hardware for a secure and straightforward installation, providing peace of mind that your differential settings will remain exactly where you set them. Don't overlook the importance of these small but critical components in your drivetrain build.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eApplication:\u003c\/b\u003e Ford 9-inch Differentials\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFunction:\u003c\/b\u003e Locks Differential Adjusters\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial:\u003c\/b\u003e High-Strength Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFinish:\u003c\/b\u003e Cadmium Plated\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eQuantity:\u003c\/b\u003e Pair (2 locks)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncluded:\u003c\/b\u003e All necessary mounting hardware\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eTrust Mark Williams for components that are built to perform and last. These differential adjuster locks are a vital investment for anyone seeking to maximize the durability and performance of their Ford 9-inch rear end.\u003c\/p\u003e\n\u003cdiv style=\"margin:24px 0;border-top:1px solid #eee;padding-top:18px;\"\u003e\n\u003ch3 style=\"margin:0 0 6px;\"\u003eOften bought with\u003c\/h3\u003e\n\u003cp style=\"font-size:0.9em;color:#555;margin:0 0 8px;\"\u003eOther popular Mark Williams products customers consider together:\u003c\/p\u003e\n\u003cul style=\"padding-left:20px;margin:0;\"\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/quick-rel-steering-hub\" style=\"color:#0066cc;text-decoration:none;\"\u003eMark Williams Quick Release Steering Hub 3\/4in Shaft — 4-Bolt Wheel\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/gt-5-bolt-quick-release\" style=\"color:#0066cc;text-decoration:none;\"\u003eMark Williams GT 5-Bolt Quick Release - Grant GT 3\/4in Shaft — Black Anodized Aluminum\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/q-r-steering-hub-6-hole-sparco-momo-str-wheels\" style=\"color:#0066cc;text-decoration:none;\"\u003eMark Williams SFI 42.1 Quick Release Hub — Fits Sparco\/Momo 6-Hole\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/gm-8-5-10-pinion-yoke\" style=\"color:#0066cc;text-decoration:none;\"\u003eMark Williams 1350 U-Joint Pinion Yoke — GM 8.5\" 10-Bolt, 30 Spline\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"margin:4px 0;\"\u003e\u003ca href=\"https:\/\/ggcracing.com\/products\/th400-t-10-trans-yoke\" style=\"color:#0066cc;text-decoration:none;\"\u003eMark Williams TH400 T-10 Slip Yoke 32 Spline — 1350 U-Joint\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\/\",\"@type\":\"Product\",\"name\":\"Mark Williams 57906 Differential Adjuster Locks (Pair) \\u2014 Fits Ford 9in\",\"description\":\"Prevent differential adjuster movement in your Ford 9in with Mark Williams 57906 Adjuster Locks. 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Contact our experts at GGCRACING with your VIN and we'll verify before you order.\"}},{\"@type\":\"Question\",\"name\":\"How long is shipping for Mark Williams?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most in-stock items ship same or next business day. Free shipping on orders over $99 in the continental US. Tracking is provided via email as soon as your order leaves our warehouse.\"}},{\"@type\":\"Question\",\"name\":\"How do I install the Mark Williams 57906 Differential Adjuster Locks (Pair) \\u2014 Fits Ford 9in?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Most installs are bolt-on with basic hand tools. See manufacturer documentation for torque specs and procedures.\"}}]}\u003c\/script\u003e","brand":"Mark Williams","offers":[{"title":"Default Title","offer_id":40881381572692,"sku":"BJFM_57906","price":5.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0552\/3210\/2484\/files\/MWE57906.jpg?v=1714535323","url":"https:\/\/ggcracing.com\/products\/adjuster-locks-pr-ford-9-inch","provider":"GGCRACING INC","version":"1.0","type":"link"}