{"product_id":"ford-8-8-simple-swap-kit-31-spline-rear-axle","title":"Ford 8.8 Simple Swap Kit – 31 Spline (Rear Axle)","description":"\u003ch3\u003eFord 8.8 Rear Axle Simple Swap — 31 Spline\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBasic swap kit with plates, perches, U-bolts, and shock brackets\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis kit provides the essential hardware to mount a 31-spline Ford 8.8 rear axle. It includes 3\/8\" A50 steel U-bolt plates with three spring-pin locations, matching spring perches, four 5\/8\" U-bolts (10\" × 3-1\/4\"), and a pair of shock brackets. Components are matched so you can set center-pin position and pinion angle without sourcing parts individually.\u003c\/p\u003e\n\u003cp\u003eTypical donor axles are found in Ford Explorers, F-150 trucks, and Broncos—verify tube diameter (3.25\"), spring spacing, and axle width before welding. Use the three pin holes to fine-tune wheelbase, and select U-bolt length based on spring pack height and plate stack. After installation, torque U-bolts in a cross pattern and re-torque after initial miles or trail use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePart Number: R1138\u003c\/li\u003e\n\u003cli\u003eFor 31-spline Ford 8.8 rear axle swaps\u003c\/li\u003e\n\u003cli\u003ePlates: 3\/8\" A50 steel with three spring-pin positions\u003c\/li\u003e\n\u003cli\u003ePerches: matched to plates; for 3.25\" axle tubes\u003c\/li\u003e\n\u003cli\u003eU-bolts: 10\" length × 5\/8\" dia × 3-1\/4\" width, with 1\/4\" washers and nuts\u003c\/li\u003e\n\u003cli\u003eIncludes pair of shock brackets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eKit Includes\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e(2) Leaf spring plates, 3\/8\" A50 steel (three pin positions)\u003c\/li\u003e\n\u003cli\u003e(2) Spring perches (three pin positions; 3.25\" tube)\u003c\/li\u003e\n\u003cli\u003e(2) Shock brackets\u003c\/li\u003e\n\u003cli\u003e(4) U-bolts, 10\" × 5\/8\" × 3-1\/4\", with 1\/4\" laser-cut washers and nuts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNote\u003c\/h4\u003e\n\u003cp\u003eConfirm axle width, spring spacing, and tube diameter before welding. Choose U-bolt length that provides full thread engagement past the nut; trim excess after torque.\u003c\/p\u003e","brand":"RuffStuff Specialties","offers":[{"title":"10\" Long","offer_id":53429644755217,"sku":"R1138-B-Kit-1","price":135.91,"currency_code":"USD","in_stock":false},{"title":"13\" Long","offer_id":53429644787985,"sku":"R1138-B-Kit-3","price":135.91,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0967\/9667\/2273\/files\/R1138-ford-8-point-8-simple-swap-kit-31-spline-rear-axle-image-1-ruffstuff-specialties.webp?v=1776410917","url":"https:\/\/4x420-4-7.com\/products\/ford-8-8-simple-swap-kit-31-spline-rear-axle","provider":"4X420 Offroad","version":"1.0","type":"link"}