SwingCase Gladiator Fitment 2026 — SC300, SC301, Install Notes

By Cole Briggs, Founder & Editor — Updated: October 30, 2026

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SwingCase Codes for the Jeep Gladiator

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Why the Gladiator Uses RAM 1500 Codes

The Jeep Gladiator is a body-on-frame truck built on the Wrangler JL chassis with a pickup bed derived from RAM architecture. The bed rail geometry matches the RAM 1500 DT platform closely enough that UnderCover uses the same bracket codes. This is confirmed by UnderCover's fitment tool and owner installs across Jeep forums, including JeepGladiatorForum.com.

The shared code means a practical shortcut for buyers: if you have verified SC300/SC301 fitment on a RAM 1500 DT (2019+), those same codes apply to the Gladiator. The bracket geometry at the rail cap mounting position — the six self-tapping screw locations — is identical between the two trucks.

Gladiator Bed: The 5 ft Constraint

The Gladiator has a 5 ft bed (60 inches). This is shorter than a standard RAM Crew Cab bed (5 ft 7 in) and significantly shorter than a RAM long bed (8 ft). The shorter bed means less positioning margin — the tailgate clearance check is especially important on the Gladiator.

The SwingCase is designed to swing 180° open. On a short 5 ft bed, the bracket must be positioned precisely to ensure the open SwingCase clears the tailgate without restriction. The recommended rear screw position (6–8 inches from the inside face of the closed tailgate) still applies, but the Gladiator's compact bed leaves less room for error than most other supported trucks.

Before drilling any holes: mount the bracket temporarily (tape or light clamp), swing the case to full open, and verify 180° clearance. This step is more critical on the Gladiator than on any other truck in the SwingCase fitment range.

Trim Level Coverage

The Gladiator is sold in multiple trim levels, each with different suspension, capability, and feature sets — but all sharing the same bed and rail geometry. SC300/SC301 cover every Gladiator trim:

Trim differences on the Gladiator affect the chassis, suspension, lockers, and electronic systems — not the bed rail mounting surface. There is no Gladiator trim that requires a different SwingCase code.

Mopar Bed Accessories

Many Gladiator owners add factory Mopar bed accessories, either at purchase or after delivery. This matters for SwingCase installation because the SwingCase bracket mounts to the inside top face of the bed rail cap — a flat, unobstructed surface is required at the driver or passenger rear.

Mopar accessories to check before ordering:

• Bed rail channel covers or bed rails that sit over the top of the rail cap
• Tie-down rail systems that attach to the inner rail face
• Stake pocket covers, plugs, or integrated storage accessories

If any Mopar accessory occupies the rear section of the rail cap where the SwingCase bracket would sit, it must be removed before installation — or you need to determine whether partial removal clears enough surface. Run your hand along the inner top rail face at the rear section (driver or passenger, depending on which side you are installing) to confirm the surface is clear and flat before ordering.

Soft Top and Hard Top: No Impact on Fitment

The Gladiator's top options — including the factory soft top, the factory hardtop, and the popular Sky One-Touch power top — do not affect bed fitment. The SwingCase mounts entirely within the bed, at the rear section of the rail cap. The cab and top configuration have no bearing on SC300/SC301 fitment. Whether you run topless, with a soft top, or with a factory hardtop, the same SC300/SC301 codes apply.

Tonneau Cover Compatibility

The Gladiator's short 5 ft bed means any tonneau must be specifically sized for the Gladiator — not a standard short-bed or mid-size tonneau. Major tonneau manufacturers make Gladiator-specific covers:

Many Gladiator owners run without a tonneau cover at all — the open bed is common in the Gladiator community given its offroad and adventure use cases. If you are not running a tonneau, the clearance concern does not apply. If you are adding a SwingCase to a Gladiator that already has a tonneau, measure the clearance between the installed SwingCase (closed position) and the underside of the closed tonneau before ordering.

Frequently Asked Questions