Rock Assault Rear Axle Housing Kit

Product Overview

The Rock Assault Rear Axle Housing collection is designed for Toyota trucks, 4Runners, and Tacomas. Available in two width configurations: IFS Width and Tacoma Width. These premium fabricated axle housings deliver exceptional ground clearance and ensure maximum durability for extreme off-road performance. This exclusive design features all-new components with offset axle tubes and precision-formed steel construction, offering superior strength and long-lasting reliability for competitive off-road use. All kits include 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
  
• Enhanced Tube Engagement: 5/8" deeper tube engagement with 360° gusset welding for unparalleled strength
• Heavy-Duty Construction: 5/16" thick DOM axle tubes with 1/4" plate steel center section
• Chromoly Flanges: 4130 Chromoly outer offset flanges prevent distortion and bending
• Professional Grade: Precision alignment checked with 3D digital imaging for 100% straightness
• E-Locker Compatible: Both models are available in standard and E-Locker configurations
• Multiple Width Options: Choose IFS width or Tacoma width for your specific application

 

Technical Specifications

IFS Width Model:
Material: 1/4" plate steel center section, 5/16" DOM axle tubes, 4130 Chromoly flanges
Overall Length: 51 3/8" mounting flange to mounting flange
Weight: 54 lbs empty
Differential Mount: 1/2" plate steel mounting surface for the Toyota 8" differential

Tacoma Width Model:
Material: 1/4" plate steel center section, 5/16" DOM axle tubes, 4130 Chromoly flanges
Width: 60" WMS to WMS
Overall Length: 53 1/4" mounting flange to mounting flange
Weight: 54 lbs empty
Differential Mount: 1/2" plate steel mounting surface for the Toyota 8" differential

Fitment Guide

IFS Width Model:

• 1979-1995 Toyota Pickup (All Engines) - IFS Width - Toyota 8" Differential
• 1985-1995 Toyota 4Runner (All Engines) - IFS Width - Toyota 8" Differential
• 1995-2004 Toyota Tacoma (All Engines, Non-ABS only) - IFS Width - Toyota 8" Differential

Tacoma Width Model:

• 1995-2004 Toyota Tacoma (All Engines, Non-ABS only) - 60" WMS - Toyota 8" Differential
• Custom Off-Road Builds requiring Tacoma width - 60" WMS - Toyota 8" Differential

Important: Both models are universal fit housings requiring custom fabrication and suspension setup. Professional installation is strongly recommended for proper alignment and safety. All models utilize the Toyota 8" differential only.

 

Installation & Maintenance

Installation Difficulty: Intermediate-Advanced
Tools Required: Welding equipment, alignment tools, suspension components, differential
Professional Installation: Highly Recommended - requires custom fabrication and precise alignment

Important Installation Notes:

• Grind the differential housing flange flush with the axle housing for maximum ground clearance
• Degrease housing inside and out before installation and painting
• Use the included differential stud kit and RTV silicone for proper installation
• Follow proper ring and pinion break-in procedures to maintain warranty

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.
• Follow proper ring and pinion break-in procedures to maintain warranty
• Use the inspection hole for easy fluid level and gear condition monitoring.
• Thoroughly degrease before painting for optimal adhesion.

Frequently Asked Questions

Q: What's the difference between the IFS Width and Tacoma Width models?
A: IFS Width models use stock 1986-1995 Toyota Pickup/4Runner axle shafts and are compatible with a broader range of Toyota vehicles. Tacoma Width models are 60" WMS to WMS, designed specifically for 1995-2004 Toyota Tacoma applications using Non-ABS axle shafts only.

Q: What's the difference between Standard and E-Locker bolt patterns?
A: Standard models are designed for Toyota 8" open or limited-slip differentials. E-Locker style models feature the specific bolt pattern required for Toyota 8" E-Locker differentials.

Q: Can I use these with Toyota 8.4" differentials?
A: No, all Rock Assault rear axle housings are designed exclusively for Toyota 8" differentials only. They will not work with stock Tacoma/T100 8.4" differentials.

Q: What axle shafts do I need?
A: IFS Width models use stock or aftermarket 1986-1995 Toyota Pickup/4Runner axle shafts. Tacoma Width models require 1995-2004 Toyota Tacoma Non-ABS axle shafts only.

Why Upgrade Rear 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.