Trail-Gear Rock Assault Fully Built Front Axle | Leaf Spring (1985-95 4Runner / 1979-95 Pickup)

Trail-Gear Rock Assault Fully Built Front Axle For 1985–1995 Toyota 4Runner / 1979–1995 Toyota Pickup 4WD leaf-spring solid-front-axle applications and leaf-spring solid-axle conversions Overview The Trail-Gear Rock Assault Fully Built Front Axle is a complete, brand-new heavy-duty front axle assembly for classic Toyota 4WD builds. Each axle is assembled with upgraded 30-spline drivetrain components, heavy-duty steering hardware, upgraded brakes, and the selected differential configuration, eliminating the need to rebuild a used donor axle. Every configuration offered uses a right-hand differential drop and is built specifically for leaf-spring applications. Choose the housing width, Toyota third-member style and gear ratio, locker, and either locking hubs or Creeper flanges. Key Features Complete new axle assembly: Built hub-to-hub from new components rather than refurbished junkyard parts. 30-spline drivetrain: Longfield 30-spline Birfields with 30-spline chromoly axle shafts. Heavy-duty knuckle hardware: Fully Loaded Six-Shooter knuckle kit with chromoly spindles, Trail Safe seals, and Super Metal knuckle studs. Upgraded brakes: Heavy-duty front brake rotors and calipers are included in the assembled axle. Steering hardware included: Heavy-duty tie rod and drag link are installed as part of the assembly. Forged knuckle balls: 1035-steel construction for increased strength over used factory housings. Heavy-duty axle tubes: 5/16-inch high-strength DOM tubes engage 5/8 inch farther into the center section. Internal housing reinforcement: 360-degree internal tube gusset supports the axle tubes inside the center section. Heavy-duty center section: Press-formed 1/4-inch plate-steel shell with a 1/2-inch differential mounting surface. Improved ground clearance: Approximately 3/8 inch more clearance beneath the axle tubes and at least 3/4 inch more beneath the differential housing than the referenced factory-style geometry. Vehicle Fitment 1979–1983 Toyota Pickup – 1st Gen – 4WD: Factory leaf-spring solid front axle. 1984–1985 Toyota Pickup – 2nd Gen – 4WD: Factory leaf-spring solid front axle. 1986–1988 Toyota Pickup – 2nd Gen – 4WD: Requires a leaf-spring solid-axle conversion. 1989–1995 Toyota Pickup – 3rd Gen – 4WD: Requires a leaf-spring solid-axle conversion. 1985 Toyota 4Runner – 1st Gen – 4WD: Factory leaf-spring solid front axle. 1986–1989 Toyota 4Runner – 1st Gen – 4WD: Requires a leaf-spring solid-axle conversion. 1990–1995 Toyota 4Runner – 2nd Gen – 4WD: Requires a leaf-spring solid-axle conversion. Fitment Notes Right-hand differential drop only. Every configuration uses a right-hand differential drop. Leaf-spring applications only. This assembled axle is not intended for 3-link or 4-link mounting as supplied. Solid-axle conversion required: 1986–1995 4Runner / 1986–1995 Pickup applications require a properly configured leaf-spring solid-axle conversion. The fully built axle is supplied bare; additional suspension bracketry should not be welded onto the assembled axle. External axle gussets are not included. The housing does include an internal 360-degree tube gusset. To obtain the housing's full differential ground clearance, the bottom of the differential housing flange must be ground flush with the axle housing. Professional installation by an experienced solid-axle Toyota technician or fabrication shop is recommended. For builds that need additional brake-hose length after suspension or solid-axle changes, see the Trail-Gear 26 in. Extended Brake Lines. Product Specifications Brand: Trail-Gear Product Type: Fully Built Front Axle Assembly Position: Front Drivetrain: 4WD Suspension Type: Leaf Spring Differential Drop: Right-Hand Axle / Birfield Spline: 30-Spline Housing Width Options: +3 in. / +5 in. Gear Ratio Options: 4.88 / 5.29 Locker Options: Detroit / ARB / Grizzly / Zip Hub Options: Locking Hubs / Creeper Flanges Warranty: 12-month limited warranty for the original purchaser, subject to Trail-Gear warranty terms and exclusions. Installation Requirements Confirm the selected axle width, Toyota third-member style, gear ratio, locker, and hub configuration before installation. Fill the differential with the correct gear oil before operation and follow the required ring-and-pinion break-in procedure. After installation, drive lightly for 20–30 minutes, then allow the differential to cool for at least two hours. Avoid heavy throttle and do not tow during the first 500 miles. Change the differential oil after the first 500 miles. Available Configurations Width: +3 in. / +5 in. Third Member & Ratio: 4-Cyl / 4.88; 4-Cyl / 5.29; V6 / 4.88; V6 / 5.29; High-Pinion / 4.88; High-Pinion / 5.29. Locker & Hub: Detroit / Locking Hubs; Detroit / Creeper Flanges; ARB / Locking Hubs; ARB / Creeper Flanges; Grizzly / Locking Hubs; Grizzly / Creeper Flanges; Zip / Locking Hubs; Zip / Creeper Flanges. Important: The “4-Cyl” and “V6” option labels describe the Toyota third-member/differential style selected for the axle. They do not identify the engine installed in the vehicle.