Rock Assault Front Axle Housing Kit 30-Spline

Product Overview

Trail-Gear Rock Assault Front Axle Housing compatible with Toyota trucks, 4Runners, and off-road builds. This premium fabricated axle housing delivers exceptional ground clearance and ensures maximum durability for extreme off-road performance. This industry-leading design is built with all-new components and forged steel knuckle balls, offering superior strength and long-lasting reliability.  Select your Width, Locker Type, and Suspension.  All kits are 30-spline with an inspection hole.

Key Features & Benefits

• • Maximum Ground Clearance: Offset axle tubes provide 3/8" additional clearance, shaved center section adds 3/4" under differential
• • All-New Construction: First in the industry to be built with all-new parts, not recycled 30-year-old components
• • Forged Steel Knuckle Balls: 1035 steel construction eliminates closed or bent knuckle ball failures
• • IFS Width Design: 3" longer short side eliminates the need for wheel spacers on IFS width applications
• • Professional Grade: Precision alignment checked with 3D digital imaging for 100% straightness

Technical Specifications

Material: 1/4" A572 Grade 50 steel center section, 5/16" 1020 DOM axle tubes
Width: 59" WMS to WMS (IFS width)
Tube Diameter: 3" outer diameter with 5/16" wall thickness
Differential Mount: 1/2" plate steel mounting surface for the Toyota 8" differential

Fitment Guide

• Toyota Pickup - 59" WMS - Toyota 8" Differential
• Toyota 4Runner - 59" WMS - Toyota 8" Differential
• Toyota Tacoma / 3rd Gen 4Runner - 61.75" WMS - Toyota 8" Differential
• Custom Off-Road Builds - 59" WMS - Toyota 8" Differential

Important: This is a universal-fit housing requiring custom fabrication and suspension setup. Professional installation is strongly recommended for proper alignment and safety.

Installation & Maintenance

Installation Difficulty: Intermediate-Advanced
Estimated Install Time: 8-12 hours with full suspension setup
Tools Required: Welding equipment, alignment tools, suspension components, differential
Professional Installation: Highly Recommended - requires custom fabrication and precise alignment

Maintenance Tips:

• Apply rust preventative coating before final installation - ships lightly oiled
• Grind the differential housing flange flush with the axle housing for maximum ground clearance
• Regularly inspect welds and mounting points after extreme use
  

Frequently Asked Questions

Q: What's included in the package?
A: Bare axle housing with forged knuckle balls, 30-spline short side chromoly axle shaft. Optional suspension configurations include bare, spring perches, or 3-link brackets. Differential, ring and pinion, and other components sold separately.

Q: How difficult is installation?
A: This is an intermediate-advanced installation requiring custom fabrication, welding, and suspension setup. Professional installation by an experienced off-road shop is highly recommended. Expect 8-12 hours for complete installation.

Related Trail-Gear Parts You May Need

• Six-Shooter Knuckle Kit - Complete knuckle rebuild with upgraded components
• Longfield 30-Spline Birfields - Heavy-duty CV joints for extreme applications
• Complete Front High Pinion Differential - Various gear ratios available
• Front 3-Link Suspension Kit - Complete suspension solution for housing

Why Upgrade Front Axle Housing?

• Bent or damaged stock axle housing from rock strikes
• Cracked center section from extreme torque loads
• Inadequate ground clearance limits trail performance
• Need for wider stance without wheel spacers
• Upgrading to larger tires requires a stronger axle assembly

12-Month Manufacturer Limited Warranty 
Trail-Gear's 12 Month Limited Warranty covers this product. All warranties are limited to the original purchaser and are not transferable. The warranty period commences on the date of purchase.