{"product_id":"trail-gear-rock-assault-fully-built-rear-axle-toyota-pickup-4runner-tacoma","title":"Trail-Gear Rock Assault Fully Built Rear Axle | Leaf Spring (1985-95 4Runner \/ 1979-95 Pickup \/ 1995-04 Tacoma)","description":"\u003ch2\u003eTrail-Gear Rock Assault Fully Built Rear Axle\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eFor 1985–1995 Toyota 4Runner, 1979–1995 Toyota Pickup, and 1995–2004 Toyota Tacoma leaf-spring rear-axle builds\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe Trail-Gear Rock Assault Fully Built Rear Axle is a complete hub-to-hub heavy-duty rear axle assembly built from new components. It combines the Rock Assault fabricated housing, 30-spline chromoly axle shafts, rear disc brakes, bearing and hub components, and the selected Toyota third-member, ring-and-pinion ratio, and locker configuration.\u003c\/p\u003e\n\u003cp\u003eThe axle is supplied with bare suspension-mount locations so the leaf-spring perches can be positioned for the vehicle and desired pinion angle before welding. Width, differential style, gear ratio, and locker are selected when ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eComplete hub-to-hub rear axle assembly built from new components\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e30-spline chromoly rear axle shafts\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eComplete rear disc-brake setup\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-inch outside-diameter axle tubes\u003c\/strong\u003e with 5\/16-inch wall thickness\u003c\/li\u003e\n\u003cli\u003eAxle tubes extend 5\/8 inch farther into the center section than the referenced factory-style construction\u003c\/li\u003e\n\u003cli\u003e360-degree internal tube gusset reinforces the tubes inside the housing\u003c\/li\u003e\n\u003cli\u003eOffset tube geometry provides approximately 3\/8 inch additional clearance beneath the tubes\u003c\/li\u003e\n\u003cli\u003ePress-formed 1\/4-inch steel center shell with a 1\/2-inch differential mounting surface\u003c\/li\u003e\n\u003cli\u003eCenter-section design provides a minimum of approximately 3\/4 inch additional clearance beneath the differential\u003c\/li\u003e\n\u003cli\u003e4130 chromoly outer offset flanges\u003c\/li\u003e\n\u003cli\u003eHousing alignment checked with 3D digital imaging during assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eVehicle Fitment\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eToyota 4Runner\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1985–1989 Toyota 4Runner – 1st Gen – Factory leaf-spring rear suspension\u003c\/li\u003e\n\u003cli\u003e1990–1995 Toyota 4Runner – 2nd Gen – Requires a properly configured leaf-spring rear suspension conversion\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eToyota Pickup\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1979–1983 Toyota Pickup – 1st Gen – Leaf-spring rear suspension\u003c\/li\u003e\n\u003cli\u003e1984–1988 Toyota Pickup – 2nd Gen – Leaf-spring rear suspension\u003c\/li\u003e\n\u003cli\u003e1989–1995 Toyota Pickup – 3rd Gen – Leaf-spring rear suspension\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eToyota Tacoma\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e1995–2004 Toyota Tacoma – 1st Gen – Leaf-spring rear suspension\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eLeaf-spring rear-suspension builds only.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e1990–1995 2nd Gen 4Runner applications require a leaf-spring rear suspension conversion; these vehicles did not use a factory leaf-spring rear suspension.\u003c\/li\u003e\n\u003cli\u003eSpring perches are supplied unwelded. The installer must establish the correct perch spacing and pinion angle before welding.\u003c\/li\u003e\n\u003cli\u003eThis fully assembled axle is not intended to have additional 3-link or 4-link suspension bracketry welded to it.\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e4-Cyl and V6 option labels identify Toyota third-member \/ differential style, not the engine installed in the vehicle.\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eChoose axle width based on the intended vehicle, wheel\/tire package, and suspension setup. Rock Assault rear housings are offered in 58-inch and 60-inch wheel-mount-surface widths.\u003c\/li\u003e\n\u003cli\u003eTo obtain the housing's full differential ground clearance, the bottom of the differential housing flange must be ground flush with the axle housing.\u003c\/li\u003e\n\u003cli\u003eProfessional axle setup, fabrication, and welding are recommended.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eBrand:\u003c\/strong\u003e Trail-Gear\u003cbr\u003e\u003cstrong\u003eSeries:\u003c\/strong\u003e Rock Assault\u003cbr\u003e\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Fully Built Rear Axle Assembly\u003cbr\u003e\u003cstrong\u003ePosition:\u003c\/strong\u003e Rear\u003cbr\u003e\u003cstrong\u003eAxle Spline:\u003c\/strong\u003e 30-Spline\u003cbr\u003e\u003cstrong\u003eHousing Tube OD:\u003c\/strong\u003e 3 in.\u003cbr\u003e\u003cstrong\u003eHousing Tube Wall:\u003c\/strong\u003e 5\/16 in.\u003cbr\u003e\u003cstrong\u003eAvailable Wheel-Mount-Surface Widths:\u003c\/strong\u003e 58 in. \/ 60 in.\u003cbr\u003e\u003cstrong\u003eSuspension Mount:\u003c\/strong\u003e Bare \/ Leaf-Spring Perches Require Welding\u003cbr\u003e\u003cstrong\u003eGear Ratios:\u003c\/strong\u003e 4.88 \/ 5.29\u003cbr\u003e\u003cstrong\u003eLocker Options:\u003c\/strong\u003e Spool \/ Grizzly \/ Zip Air Locker \/ ARB \/ Detroit\u003cbr\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e 12-Month Limited Warranty\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eInstallation \u0026amp; Ring-and-Pinion Break-In\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eConfirm the selected axle width, Toyota third-member style, gear ratio, and locker before installation.\u003c\/li\u003e\n\u003cli\u003ePosition and weld the leaf-spring perches for the vehicle and required pinion angle.\u003c\/li\u003e\n\u003cli\u003eFill the differential with the correct gear oil before operation.\u003c\/li\u003e\n\u003cli\u003eAfter installation, drive lightly for 20–30 minutes, then allow the differential to cool for at least two hours.\u003c\/li\u003e\n\u003cli\u003eAvoid heavy throttle during the first 500 miles.\u003c\/li\u003e\n\u003cli\u003eDo not tow during the first 500 miles.\u003c\/li\u003e\n\u003cli\u003eChange the differential oil after the first 500 miles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAvailable Configurations\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e+2 Width\u003c\/li\u003e\n\u003cli\u003eIFS Width\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eThird Member \u0026amp; Ratio\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4-Cyl \/ 4.88\u003c\/li\u003e\n\u003cli\u003e4-Cyl \/ 5.29\u003c\/li\u003e\n\u003cli\u003eV6 \/ 4.88\u003c\/li\u003e\n\u003cli\u003eV6 \/ 5.29\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eLocker\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpool\u003c\/li\u003e\n\u003cli\u003eGrizzly\u003c\/li\u003e\n\u003cli\u003eZip Air Locker\u003c\/li\u003e\n\u003cli\u003eARB\u003c\/li\u003e\n\u003cli\u003eDetroit\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Trail-Gear","offers":[{"title":"+2 Width \/ 4-Cyl \/ 4.88 \/ Spool","offer_id":53605659869493,"sku":null,"price":4599.99,"currency_code":"USD","in_stock":true},{"title":"+2 Width \/ 4-Cyl \/ 4.88 \/ Grizzly","offer_id":53605659902261,"sku":null,"price":4599.99,"currency_code":"USD","in_stock":true},{"title":"+2 Width \/ 4-Cyl \/ 4.88 \/ Zip Air Locker","offer_id":53605659935029,"sku":null,"price":4599.99,"currency_code":"USD","in_stock":true},{"title":"+2 Width \/ 4-Cyl \/ 4.88 \/ ARB","offer_id":53605659967797,"sku":null,"price":4599.99,"currency_code":"USD","in_stock":true},{"title":"+2 Width \/ 4-Cyl \/ 4.88 \/ 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