The Jeep Gladiator is one of the most capable platforms to roll off a factory floor. It combines Wrangler DNA with a functional truck bed, which makes it the perfect starting point for a serious trail build. But stock capability only goes so far. This custom Jeep Gladiator build pushed every boundary, replacing nearly every weak link in the drivetrain and armor system to create a rig that can handle anything Florida's trails, and well beyond, can throw at it.
Here is the full breakdown of what went into this build at Redline Auto Creations.
The owner came to us with a clear goal: build a Gladiator that could run 42-inch tires on serious trails without breaking. That single requirement dictated almost every decision that followed. Running 42s is not just a matter of bolting on a lift kit. The factory axles, fenders, bumpers, and steps all become limiting factors. This build addressed every one of them.
The factory Dana 44 axles on the Gladiator are solid for moderate off-roading, but they are not built to handle the stress of 42-inch tires on rocky terrain. The torque loads on the axle shafts, U-joints, and differential increase dramatically with larger tires.
We replaced both axles with Currie Extreme 60 axles featuring high-pinion front and rear housings with 35-spline axle shafts.
Why the Currie Extreme 60? Several reasons:
The axle swap is the most involved part of any build like this, but it is also the most important. Everything else depends on a drivetrain that can survive the loads.
Factory bumpers on the Gladiator are designed to meet federal crash standards and look presentable in a dealer showroom. They are not designed to protect your investment on the trail.
We installed Road Armor Stealth bumpers on both the front and rear. The Stealth line uses a clean, low-profile design that maximizes approach and departure angles while providing serious protection.
Front bumper features:
Rear bumper features:
The Stealth design philosophy works well for builds like this. It does not add unnecessary bulk, which keeps the overall vehicle weight more manageable and maintains a cohesive look.
Running 42-inch tires on a Gladiator means the factory fender flares have to go. They simply do not provide enough clearance. We replaced them with Road Armor Stealth fenders, which are high-clearance units that allow full suspension articulation without tire contact.
Inside, we installed Artec inner fenders. These aluminum panels serve two purposes:
1. Protection. They shield the engine bay and wiring from mud, water, and debris that gets thrown by the tires.
2. Appearance. They give the engine bay a finished, clean look when the hood is open or when the fenders are visible on the trail.
Artec's inner fenders are laser-cut and precision-bent, so the fitment is excellent. They bolt directly to the factory mounting points with no drilling or modification required.
With a significant lift and 42-inch tires, getting in and out of this Gladiator requires a step. But traditional fixed rock sliders sit low enough to catch on obstacles, and fixed running boards are even worse.
Rockslide Engineering electric steps solve this problem with a motorized design that deploys when you open the door and retracts when you close it. When retracted, they tuck up tight against the body, well above the rocker panels, providing maximum ground clearance. When deployed, they drop down to a comfortable step height.
These units also function as legitimate rock sliders. The construction is heavy enough to support the weight of the vehicle on a rock ledge, which is exactly what sliders are supposed to do. The fact that they double as powered steps makes them one of the most practical accessories on this build.
The 42-inch tires are the visual and functional centerpiece of this build. At this size, the tire selection narrows considerably. You are looking at purpose-built off-road rubber with aggressive tread patterns designed for rock crawling, mud, and loose terrain.
Forty-two-inch tires on a Gladiator deliver:
The trade-offs are real, though. Larger tires are heavier, which affects acceleration and braking. They also require regearing the axles to restore the effective gear ratio. The Currie Extreme 60 axles were set up with appropriate gear ratios to keep the engine in its power band.
Trail rigs do not have to sound terrible. We installed a custom audio system designed to deliver clean, powerful sound whether the owner is cruising on the highway with the top up or rolling topless down a beach trail.
The system was designed to handle the unique challenges of a Jeep, which is essentially an open-air vehicle. Sealed speaker enclosures, weather-resistant components, and an amplifier with enough power to overcome wind and tire noise ensure the music comes through clearly regardless of conditions.
While we have focused on the axles, armor, and tires, the suspension system ties everything together. The Gladiator received a comprehensive suspension upgrade to achieve the ride height needed for 42-inch tire clearance while maintaining a ride quality that does not punish the driver on the highway.
The suspension setup includes long-travel shocks with remote reservoirs, adjustable control arms for precise alignment after the axle swap, and a track bar that is matched to the new ride height. These components work together to allow the full wheel travel that makes 42-inch tires effective on the trail. Without proper suspension tuning, larger tires are just for show. With it, they become functional tools that get you over and through obstacles that would stop a lesser build.
The suspension was tuned specifically for this combination of axles, tire weight, and intended use. This is not a one-size-fits-all spring and shock package. Every bushing, every joint, and every link was selected to work with the specific loads and geometry of this build.
This Gladiator went from a capable-but-stock pickup to one of the most trail-ready builds in the Tampa area. Every modification was chosen to support the goal of running 42-inch tires reliably on demanding terrain.
The key takeaway from a build like this is that everything is connected. You cannot just bolt on 42-inch tires and call it done. The axles need to support the load. The fenders need to clear the rubber. The bumpers need to handle the new approach angles. The steps need to get out of the way on the trail. When every component is selected and installed as part of a cohesive plan, the result is a vehicle that works as a complete system.
This is build number one of many spotlights we will share from our shop. With 61 full builds completed, each one teaches us something new and makes the next one even better.
For owners considering a similar build, the key advice is this: start with the axles and work outward. Everything else is relatively easy to change or adjust. Axles are the foundation that determines what size tires you can run reliably, and that tire size dictates every other decision.
Whether you are planning a full-frame-off build or a targeted set of upgrades, Redline Auto Creations has the experience and the brand partnerships to make it happen. We work with Road Armor, Rockslide Engineering, Artec, Currie, and dozens of other manufacturers to source the right parts for your vision.
Visit us at 11626 N Florida Ave, Tampa, FL 33612, or call (813) 544-4009 to start the conversation.
At Redline Auto Creations, we specialize in crafting custom vehicles with precision and passion. From wheels and tires to suspension, performance upgrades, and custom designs, we bring your vision to life. Contact us today and transform your ride.
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