SwingCase Tacoma Fitment 2026 — SC400, SC401, Install Notes

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

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SwingCase Codes for the Tacoma

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Tacoma Generation Coverage

UnderCover uses a single code pair for the full Tacoma platform across all three generations:

Tacoma Bed Length Coverage

The Tacoma comes in two bed configurations depending on cab type:

Both bed lengths use SC400 (driver) and SC401 (passenger). UnderCover uses one code set for the entire Tacoma platform — the bracket geometry covers both configurations.

SC400 Shared Code: Tacoma and Tundra Driver Side

SC400 appears in fitment charts for both the Tacoma and the Tundra on the driver side. UnderCover confirmed the rail geometry at the driver-side mounting position is the same between these two Toyota platforms. The critical difference is on the passenger side:

If you are ordering for a Tacoma, the passenger code is SC401. If you are ordering for a Tundra, the passenger code is SC404. SC401 and SC404 are not interchangeable. This is the primary source of ordering confusion between these two Toyota pickups. The Tundra fitment page is not yet published — Tundra owners should verify codes on UnderCover's official fitment tool.

TRD Trim Levels

TRD trim levels do not modify bed rail cap geometry. SC400 and SC401 are the correct codes for all TRD variants:

• TRD Sport — SC400 (driver), SC401 (passenger)
• TRD Off-Road — SC400 (driver), SC401 (passenger)
• TRD Pro — SC400 (driver), SC401 (passenger)

The TRD Pro's Fox shocks, skid plates, and exterior trim are exterior and underbody modifications — they do not affect the interior bed rail cap where the SwingCase bracket mounts.

Install Notes Specific to the Tacoma

Spray-in bedliner

The Tacoma is one of the most commonly spray-lined trucks on the market — factory spray-in liner is standard on many trims, and dealer-applied liner is very common. If your liner covers the bed rail cap surface (the horizontal top face of the inner rail wall), you must remove coating at each of the six screw locations before drilling. Run your hand along the rail face — textured or coated surface means you need to clear it. Use a rotary tool to remove liner at each screw diameter only. Full detail at the SwingCase install guide.

Tonneau cover compatibility

The Tacoma supports a wide range of tonneau covers. SC400/SC401 are compatible with most covers provided the 3-inch clearance rule is met between the SwingCase lid and the closed tonneau. BakFlip (MX4, F1), Extang (Solid Fold 2.0, Trifecta 2.0), and most soft roll-up covers are confirmed compatible on the Tacoma. Retrax covers should be measured before ordering — clearance varies by tonneau series. The Tacoma's lower rail profile on some trims means the SwingCase sits relatively low, often giving more clearance than on taller-railed trucks such as the Silverado or F-150.

Tailgate clearance

Position the rear mounting screw with at least 6–8 inches of clearance from the closed tailgate face to ensure full 180° swing. On the 5 ft Double Cab short bed there is less positioning margin — confirm clearance before drilling.

Frequently Asked Questions