Clayton Off Road Premium Long Rear Upper Control Arms for 2020-2026 Jeep Gladiator JT

Is This for You?

• You're building a long arm JT and want a greaseable, rebuildable adjuster end on your rear upper arms — the Premium spec uses the RJ-331300-102 Narrow Series Johnny Joint with 40° of misalignment and a zerk fitting for field service without pulling the arm.
• You want GIIRO compliance at the axle side with Johnny Joint precision at the adjuster — the Premium combines both joint technologies: rebuildable rod end where adjustability matters, maintenance-free GIIRO where NVH isolation and self-centering geometry matter.
• You want the option to convert to full GIIRO adjusters later without replacing the arm — the Premium and Overland+ (COR-1910030) share identical arm bodies and frame brackets; only the adjuster joint differs and is field-swappable.

The Result

• RJ-331300-102 Narrow Series Johnny Joint at the adjuster — 2.5" forged rod end, 1" RH thread, 2.625" body width, 40° misalignment, greaseable and rebuildable.
• GIIRO dual-durometer bushing at the axle side — 2-5/8" width, 16MM bore, maintenance-free, self-centering through 30° of misalignment.
• Solid steel construction with long arm geometry — slim profile for frame and body clearance, corrects rear caster and pinion angle on 3.5"–6"+ lifted JT builds.

The COR-1910230 Premium long rear upper control arms are engineered for the 2020–2026 Jeep Gladiator JT on long arm suspension systems. The adjuster end uses the RJ-331300-102 Narrow Series Johnny Joint — a 2.5" forged rod end with 1" RH thread, 2.625" body width, and 40° of total misalignment. The narrow profile keeps the adjuster tight to the frame rail and reduces the moment arm under load, while the greaseable zerk allows periodic lubrication and the rebuildable design allows field service without arm replacement. The axle-side mount uses Clayton's GIIRO dual-durometer bushing — a softer outer layer for NVH isolation and a stiffer inner core for lateral load resistance, self-centering through 30° of misalignment without binding through the full droop-to-compression cycle. The arm body uses solid steel construction for a slim profile that clears the frame rail, body tub, and bed structure under full articulation — the same design rationale as the Overland+ version (COR-1910030). Standard tube inserts (1"x14 RH, 1.5", 0.156" wall DOM) are pressed into the tube ends for thread integrity. The arm is adjuster-swappable with the Overland+ version; the frame bracket and arm body are identical. Lifetime warranty. Made in the USA. Sold as a pair.

Audit Table

Verified Fitment (OFAS Standard)

✅ Fits 2020–2026 Jeep Gladiator JT — All Trims (Sport, Sport S, Willys, Overland, Mojave, Rubicon, Texas Trail, High Altitude) — Rear Upper, Long Arm System, 3.5"–6"+ Lift
❌ Does NOT fit Jeep Wrangler JK (2007–2018) — different rear suspension geometry
❌ Does NOT fit Jeep Wrangler JL (2018–2026) — different rear upper arm pivot spec
❌ Does NOT bolt into factory short arm bracket — long arm frame bracket required
❌ Does NOT fit front upper control arm positions
❌ Not recommended for lifts under 3.5"

Installation & Fabrication Notes

• Long arm bracket required — these arms will NOT install on a factory short arm skid plate or OEM frame bracket. Verify your long arm conversion is in place before ordering.
• Grease the RJ-331300-102 Johnny Joint at the zerk fitting before first use and at regular service intervals — do not run dry.
• Adjust arm length to approximate pinion angle and caster target before installation — fine-tune at ride height after the vehicle is on the ground.
• Torque all pivot bolts at ride height, not at full droop — torquing at droop preloads the GIIRO bushing and accelerates wear.
• Rear alignment (toe, thrust angle, and pinion angle) must be set after installation.
• GIIRO axle-side bushing is maintenance-free — no grease fitting, no service interval at the axle mount.
• On JT models with ADAS: recalibrate rear sensors and cameras after suspension geometry changes per Jeep service procedure.
• Inspect arm body for contact points against frame, body tub, and bed floor at full droop and full compression before finalizing installation.

Wheel & Tire Fitment

Compatible with standard JT wheel and tire combinations up to 37" tires on long arm lift systems running 3.5"–6"+ of lift. Larger tire fitment (38"+) may require additional clearance modifications — verify with your builder.

Engineering Question: Are you running a factory short arm suspension system on your JT? If yes, these long rear upper arms require a long arm frame bracket — they will not mount to the OEM upper arm bracket. Confirm your long arm conversion is in place and your lift height is 3.5" or greater before ordering.