{"product_id":"big-bore-xd®-steering-gear-conversion-jeep-tj-lj-2003-2006","title":"Big Bore Xd® Steering Gear Conversion - Jeep Tj \/ Lj (2003-2006)","description":"\u003csection class=\"shopify-section section\" id=\"shopify-section-template--17665205895273__main\"\u003e\n\u003cdiv class=\"page-width\"\u003e\n\u003cdiv class=\"product product--small product--left product--stacked product--mobile-hide grid grid--1-col grid--2-col-tablet\"\u003e\n\u003cdiv class=\"product__info-wrapper grid__item product__info-wrapper--extra-padding scroll-trigger animate--slide-in\"\u003e\n\u003csection class=\"product__info-container product__column-sticky\" id=\"ProductInfo-template--17665205895273__main\"\u003e\n\u003cdiv class=\"product__description rte quick-add-hidden\"\u003e\n\u003cp\u003eThe factory Mercedes ZF box on ’03–’06 TJ\/LJ Wranglers? Weak. Small piston, thin case, and a bad habit of giving up when you add bigger tires or a locker. The BIG BORE XD Conversion Gear fixes all that with a Saginaw-style box, a bigger piston for more torque, and ports for Cylinder Assist when you’re ready to step up.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThis isn’t a quick swap—it’s a proper conversion. You’ll need the right hoses, maybe a little steering shaft work, and in some cases a 1\" body lift for clearance. But once it’s in, you’ll have a steering gear that can handle real trail abuse without crying uncle.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eHeads‑up for installers\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis is a conversion.\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIt’s not a 30-minute swap. Plan for hoses, shaft mods, and maybe a body lift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHose kit required:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eUse PSC\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHK2000 Hose Conversion Kit\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor a clean install.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntermediate shaft:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eFactory shaft usually needs to be shortened ~2\". Or install Jeep\/MOPAR PN 52078705.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClearance:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSome rigs need a 1\" body lift to clear the bigger gear and lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorts:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eMetric O-ring, machined for -6 AN fittings to Cylinder Assist®. No welded junk here. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFluid:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePSC recommends\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003ePSC 715\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor best performance and component life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat’s included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBIG BORE XD Steering Gear (SG400R)\u003c\/li\u003e\n\u003cli\u003ePre-machined assist ports\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eNot Included:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eHose kit (HK2000), intermediate shaft, fluid, fittings, or body lift components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUse it with\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003ePSC\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHK2000 Hose Conversion Kit\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePSC\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eHigh-Flow Pump Kit\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(don’t starve the gear)\u003c\/li\u003e\n\u003cli\u003ePSC\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCylinder Assist Kit\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(if you’re running 37s+ or hardcore trails)\u003c\/li\u003e\n\u003cli\u003ePSC\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCooler\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eand\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eInline Filter\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efor system longevity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eIdeal for\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTJ\/LJ on\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003e35s–40s\u003c\/strong\u003e \u003c\/li\u003e\n\u003cli\u003eRigs with\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003efront lockers\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eor heavy bumpers\/winch setups\u003c\/li\u003e\n\u003cli\u003eBuilders planning for\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eCylinder Assist®\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003edown the road \u003c\/li\u003e\n\u003cli\u003eAnyone tired of blowing up ZF boxes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eInstall Instructions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0704\/8668\/7822\/files\/2003_-_06_Jeep_TJ_Steering_Shaft_Modification.pdf?v=1780623741\" rel=\"noopener\" target=\"_blank\"\u003e2003-2006 JEEP TJ steering fear upgrade - steering shaft modification tips and instructions.\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003csection class=\"shopify-section section\" id=\"shopify-section-template--17665205895273__psc_trail_score_RMztJE\"\u003e\u003c\/section\u003e","brand":"PSC","offers":[{"title":"Default Title","offer_id":43832426299470,"sku":"SG400R","price":1150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/8668\/7822\/files\/SG400R_Angle_3.png?v=1780623519","url":"https:\/\/www.precisionautooffroad.com\/products\/big-bore-xd%c2%ae-steering-gear-conversion-jeep-tj-lj-2003-2006","provider":"Precision Auto \u0026 Offroad","version":"1.0","type":"link"}