Portal Gear Kit for Toyota 4Runner 4WD

Increase your 4Runner’s drivetrain capability on technical trails, deep ruts, and larger-tire setups with clearance and gear reduction delivered directly at the wheel. The Turn Offroad Portal Gear Kit is designed specifically for 2003–2009 Toyota 4Runner 4WD models with either the V6 or V8. It adds approximately 4.75 inches of hub-level ground clearance while providing 11% gear reduction to help maintain usable gearing as tire size increases. Clear larger obstacles without depending on excessive suspension lift because the portal boxes add approximately 4.75 inches of ground clearance at the axle and wheel hub. Maintain better control and drivability with larger tires through 11% portal gear reduction that increases torque multiplication at the wheel and reduces the effect of added tire diameter on overall gearing. Reduce load on upstream drivetrain components by placing the gear reduction at the wheel instead of changing the factory differential gear sets, helping manage the demands larger tires place on the drivetrain. Keep your 4Runner functional on the road as well as the trail with a vehicle-specific system that retains OEM ABS functionality, uses the factory parking brake cables, and includes replacement rear calipers for the parking brake system. Support repeated off-road use with serviceable, durable construction through a four-gear design, CNC-machined 7075 aluminum housings, hardened 8620 steel gears, steel inserts at mounting points, a 16.9-ounce oil capacity, and accessible drain and fill points. The portal assemblies use the same core construction and 11% reduction architecture as Turn Offroad’s Bronco portal system, including straight-cut 8620 hardened steel gears, CNC-machined 7075 aluminum housings, increased oil capacity, and a double-seal design. The 4Runner version is engineered around the 2003–2009 4WD platform rather than adapted from another application. Each kit is supplied as a complete system with the required portal, axle, brake, hardware, and installation components, including the 4Runner-specific rear brake solution while retaining the OEM parking brake cables and ABS functionality. Turn’s portal positioning centers on adding usable capability while keeping a daily-driven vehicle livable on the road, with engineering and construction focused on real use rather than maximum lift for its own sake. The copy is structured to front-load fitment, specifications, compatibility, and practical outcomes for clearer product-page search intent and answer extraction.