{"product_id":"rockjock-jeep-wrangler-jl-unlimited-rear-coil-springs-3-5in-lift-pair","title":"RockJock Jeep Wrangler JL Unlimited Rear Coil Springs 3.5in Lift - Pair","description":"\u003ch4\u003eGet the Ride Height Right Without Sacrificing Factory Comfort\u003c\/h4\u003e\n\u003cp\u003eA lift that rides rough or sags after a season of wheeling isn't worth the mounting hardware. The RockJock RJ-144400-101 rear coil spring pair is engineered specifically for the Jeep Wrangler JL Unlimited, delivering a clean 3.5 inch lift while keeping compatibility with factory coil spring isolators. Each spring is finished in gloss black powder coat for long term corrosion resistance and built to work seamlessly with RockJock Johnny Joint suspension systems or other 3 to 5 inch lift setups, giving you a planted, predictable rear end whether you are running highway miles or crawling the trail.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePurpose built rear coil springs delivering a 3.5 inch lift on Jeep Wrangler JL Unlimited\u003c\/li\u003e\n\u003cli\u003eFree length of 17.460 inches for consistent, predictable ride height\u003c\/li\u003e\n\u003cli\u003eGloss black powder coat finish resists chipping and corrosion\u003c\/li\u003e\n\u003cli\u003eEngineered to work with factory coil spring isolators, top and bottom\u003c\/li\u003e\n\u003cli\u003eCompatible with RockJock Johnny Joint suspension systems and other 3 to 5 inch lift kits\u003c\/li\u003e\n\u003cli\u003eSold as a pair for a complete rear axle installation\u003c\/li\u003e\n\u003cli\u003ePart of the RockJock RJ-JLG001-101 Pro Edition JL Suspension System lineup\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment Table\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018-2026\u003c\/td\u003e\n\u003ctd\u003eJeep\u003c\/td\u003e\n\u003ctd\u003eWrangler JL Unlimited (3.6L V6 and 2.0T I4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eRockJock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eRJ-144400-101\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLocation\u003c\/td\u003e\n\u003ctd\u003eRear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLift Height\u003c\/td\u003e\n\u003ctd\u003e3.5 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFree Length\u003c\/td\u003e\n\u003ctd\u003e17.460 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGloss Black Powder Coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePair (2 Springs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eNot published by manufacturer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e(2) RockJock 3.5 in. Lift Rear Coil Springs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout RockJock\u003c\/h4\u003e\n\u003cp\u003eRockJock 4x4 designs and manufactures heavy duty suspension, axle, and steering components engineered for serious off road use without giving up on road manners. Every RockJock coil spring is developed and tested as part of a complete suspension system, so lift height, spring rate, and ride quality are dialed in together rather than guessed at individually.\u003c\/p\u003e\n\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blackopsautoworks.com\/products\/rockjock-jl-jt-tow-bar-mounting-kit-steel-bumper\" target=\"_blank\" rel=\"noopener\"\u003eRockJock JL\/JT Tow Bar Mounting Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blackopsautoworks.com\/products\/fox-2018-jeep-jl-factory-series-remote-res-rear-shock-3-5-4in-lift-w-dsc\" target=\"_blank\" rel=\"noopener\"\u003eFOX Factory Series Rear Shock, 3.5-4in Lift\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/blackopsautoworks.com\/products\/rockjock-shifter-boot-for-use-w-twin-shifter-transfer-cases\" target=\"_blank\" rel=\"noopener\"\u003eRockJock Shifter Boot\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the RJ-144400-101?\u003c\/strong\u003e\n\u003cp\u003eThe RJ-144400-101 is a pair of RockJock rear coil springs built for the Jeep Wrangler JL Unlimited, delivering a 3.5 inch lift with a free length of 17.460 inches and a gloss black powder coat finish.\u003c\/p\u003e\n\u003cstrong\u003eHow much lift does this spring provide?\u003c\/strong\u003e\n\u003cp\u003eThis spring pair is designed to deliver a 3.5 inch lift at the rear axle when installed as a set.\u003c\/p\u003e\n\u003cstrong\u003eWill this fit my Jeep Wrangler JL Unlimited?\u003c\/strong\u003e\n\u003cp\u003eYes, provided your Wrangler JL Unlimited is equipped with the 3.6L V6 or 2.0T I4 drivetrain. EcoDiesel, 392, and 4xe hybrid models use a different spring part number due to their unique weight distribution.\u003c\/p\u003e\n\u003cstrong\u003eDo I need new bump stops with this spring?\u003c\/strong\u003e\n\u003cp\u003eRockJock recommends installing properly matched bump stops when adding lift, since factory bump stops are calibrated for stock ride height and may contact the frame prematurely at 3.5 inches of lift.\u003c\/p\u003e\n\u003cstrong\u003eCan I reuse my factory coil spring isolators?\u003c\/strong\u003e\n\u003cp\u003eYes, this spring is engineered to work with the factory upper and lower coil spring isolators, so no isolator replacement is required for installation.\u003c\/p\u003e\n\u003cstrong\u003eDoes this spring work with a full RockJock suspension system?\u003c\/strong\u003e\n\u003cp\u003eYes, the RJ-144400-101 is compatible with RockJock Johnny Joint suspension systems and is also part of the RJ-JLG001-101 Pro Edition JL Suspension System kit.\u003c\/p\u003e\n\u003cstrong\u003eIs this spring sold individually or as a pair?\u003c\/strong\u003e\n\u003cp\u003eThis listing includes two rear coil springs, enough for a complete rear axle installation.\u003c\/p\u003e\n\u003cstrong\u003eWhat finish does this spring use?\u003c\/strong\u003e\n\u003cp\u003eEach spring receives a gloss black powder coat finish for long term resistance to rust and chipping in off road conditions.\u003c\/p\u003e\n\u003ch4\u003eInstall Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eSafely raise and support the rear of the vehicle, then remove the rear wheels.\u003c\/li\u003e\n\u003cli\u003eSupport the rear axle with a jack and disconnect the sway bar links, brake lines, and any other components anchored to the axle as needed for clearance.\u003c\/li\u003e\n\u003cli\u003eSlowly lower the axle to relieve spring tension, then remove the factory coil springs and isolators if they are being reused, keeping isolators in their original orientation.\u003c\/li\u003e\n\u003cli\u003ePosition the new RockJock rear coil springs onto the factory isolators, top and bottom, ensuring proper seating.\u003c\/li\u003e\n\u003cli\u003eRaise the axle back into position, reconnecting sway bar links, brake lines, and any other previously removed components.\u003c\/li\u003e\n\u003cli\u003eInstall properly matched bump stops if not already upgraded for the new ride height.\u003c\/li\u003e\n\u003cli\u003eReinstall the wheels, lower the vehicle, and torque all fasteners to manufacturer specification.\u003c\/li\u003e\n\u003cli\u003ePerform an alignment check and inspect all suspension hardware after the first several hundred miles of driving.\u003c\/li\u003e\n\u003c\/ol\u003e\n","brand":"RockJock","offers":[{"title":"Default Title","offer_id":46178267856975,"sku":"ROKRJ-144400-101","price":398.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/rj-144400-101-rear-coil-springs-2018-2026-jeep-wrangler-jl.webp?v=1784905894","url":"https:\/\/www.blackopsautoworks.com\/products\/rockjock-jeep-wrangler-jl-unlimited-rear-coil-springs-3-5in-lift-pair","provider":"Black Ops Auto Works","version":"1.0","type":"link"}