Rock Defense Rear Bumper | 4WD
Protect the legendary lines of your first-gen Toyota with the industry's premier trail armor: The Rock Defense Rear Bumper. Specifically engineered for the 6-lug 4WD 4Runner, this bumper provides the ultimate balance of high-clearance geometry and heavy-duty structural defense. Unlike standard mild-steel bumpers, the Rock Defense series is constructed from high-strength 1035 DOM tubing, ensuring your rear quarter panels and fiberglass topper remain shielded during technical rock crawling and steep descents.
Performance Engineering for the 1st Gen 4Runner
- Premium DOM Construction: Built using 1.75" OD x .120" wall thickness 1035 DOM tubing. Drawn over mandrel (DOM) steel offers a superior strength-to-weight ratio and significantly higher impact resistance than standard ERW tubing,
- Integrated 2" Receiver: Features a built-in-2-inch hitch receiver that is tucked high and tight to maximize ground clearance while providing a versatile mounting point for hitch-style accessories.
- Maximum Departure Angles: The minimalist "tube-style" design is engineered to sit flush with the chassis, allowing you to drop off ledges without the bumper "hanging" or catching on obstacles.
- Precision Chassis Mounting: Designed to bolt directly to 1st Gen 4Runner frame rails, transferring impact energy into the strongest part of the vehicle.
Key Features
- Rugged Trail Aesthetics: The aggressive profile complements the classic utility styling of the 1984-1989 chassis while signaling professional-grade protection.
- Corrosion Protection for Shipping: Each bumper is shipped in raw steel and lightly oiled to ensure a clean, rust-free surface that is ready for your choice of paint or powder coat upon arrival.
- Expandable Structural Support: For those tackling extreme terrain, this bumper is compatible with the Rear Bumper to Frame Support Kit (Part #: 3032410) for added frame reinforcement.
- Simplified Installation: Precision-jigged for a consistent, straightforward bolt-on fit using factory mounting locations.
Technical Specifications
- Material: 1.75" x 1.20" Wall 1035 DOM Tubinh
- Receiver Size: 2-Inch Integrated
- Finish: Raw Steel (Lightly Oiled)
- Application: 6-Lug 4WD Models Only
- Shipping: Flat Rate (150.00 within the Continental US)
Important Note
- Finish: This bumper is shipped as raw steel. Painting or powder coating is required to prevent corrosion.
- Usage: While equipped with a 2" receiver, this bumper is not rated for towing or heavy recovery operations.
| Note: Images are for illustration purposes only. Images may not represent the product listed. Please contact customer service with any questions or concerns: 1-928-505-2501. |
By Trail-Gear
- 1984-1989 4Runner (4WD)
CLICK HERE to open a printable PDF version of these instructions.
Installation Instructions
-Note: Ensure the bumper is thoroughly cleaned and all protective oil is removed prior to painting.
1. Align the bumper with the rear of the vehicle. Ensure all required mounting hardware is organized and within reach before beginning the installation.
2. Slide the bumper mounting brackets into the factory frame rail apertures. Ensure the mounting plates are fully seated against the frame for proper bolt alignment.
3. Assemble the washers onto the provided bolts and insert them through the aligned mounting holes. Maintain a loose fit at this stage to allow for final bumper leveling and adjustment.
4. Level and center the bumper for an even fit, then fully tighten all mounting hardware. Ensure the gap between the bumper and the body is uniform on both sides before securing the bolts.
Reference Photos: Final Installation
