Clayton Off Road GIIRO Joint Adjuster 14.3mm Thru-Bolt for Jeep Wrangler JK JL and Gladiator JT Track Bar

Is This for You?

• You have a Clayton adjustable track bar for your JK, JL, or JT and need to replace the GIIRO joint adjuster — this is the replacement GIIRO joint adjuster used in Clayton's JK, JL, and JT track bar applications. Long shank forging with a dual-durometer GIIRO bushing, 14.3mm (9/16") thru-hole, 1" x 14 shank, 1.6" outside bushing diameter. For the TJ/LJ rear track bar version with a 12mm thru-hole, see COR-4500002.
• Your current GIIRO bushing is worn, damaged, or you want to rebuild the track bar with a fresh joint — the GIIRO dual-durometer bushing provides NVH isolation for on-road comfort while allowing full articulation for off-road use. This replacement adjuster restores the original performance of the track bar without replacing the entire bar.
• You need the exact spec replacement — 1" x 14 shank, 14.3mm (9/16") thru-hole, 1.6" outside bushing diameter, long shank forging — verify these specs match your existing joint before ordering. The key distinction from COR-4500002 is the 14.3mm (9/16") thru-hole vs. 12mm on the TJ/LJ version.

The Result

• Replacement GIIRO joint adjuster for Clayton JK, JL, and JT track bar applications — long shank forging, dual-durometer GIIRO bushing, 14.3mm (9/16") thru-hole.
• Specs: 1" x 14 shank, 14.3mm (9/16") thru-hole, 1.6" outside bushing diameter. Dual-durometer design — NVH-isolating, maintenance-free, full articulation.
• Used in multiple Clayton JK/JL/JT track bar applications. For the TJ/LJ 12mm version, see COR-4500002.

The COR-4500001 is Clayton Off Road's replacement GIIRO joint adjuster with a 14.3mm (9/16") thru-hole, used in multiple Clayton track bar applications for the 2007–2018 Jeep Wrangler JK, 2018–2026 Jeep Wrangler JL, and 2020–2026 Jeep Gladiator JT. The GIIRO joint is a long shank forging with a dual-durometer bushing — the dual-durometer design provides NVH isolation for on-road comfort while allowing full articulation for off-road use. Specifications: 1" x 14 shank, 14.3mm (9/16") thru-hole, 1.6" outside bushing diameter. The key distinction from COR-4500002 (TJ/LJ version) is the 14.3mm (9/16") thru-hole vs. 12mm. Verify specs match your existing joint before ordering.

Audit Table

Verified Fitment (OFAS Standard)

✅ Fits 2007–2018 Jeep Wrangler JK (2-Door and 4-Door) — Clayton Track Bar Applications
✅ Fits 2018–2026 Jeep Wrangler JL (2-Door and 4-Door) — Clayton Track Bar Applications
✅ Fits 2020–2026 Jeep Gladiator JT — Clayton Track Bar Applications
❌ Does NOT fit TJ/LJ rear track bar (COR-4500210) — TJ/LJ uses 12mm thru-hole version COR-4500002
❌ Verify 14.3mm (9/16") thru-hole spec matches your existing joint before ordering

Installation & Fabrication Notes

• Remove the existing GIIRO joint adjuster from the Clayton track bar per Clayton's service instructions.
• Install the replacement GIIRO joint adjuster — verify the 1" x 14 shank threads fully engage and the 14.3mm thru-hole aligns with the track bar mount bolt.
• Torque the mount bolt to specification at ride height.
• Verify axle centering after reinstallation.

Wheel & Tire Fitment

This is a replacement service part for Clayton JK/JL/JT track bar applications. Wheel and tire fitment is not affected by this joint replacement.

Engineering Question: Confirm your Clayton track bar application uses the 14.3mm (9/16") thru-hole GIIRO joint. If you have a TJ or LJ with the COR-4500210 rear track bar, order COR-4500002 (12mm thru-hole) instead. Verify the shank (1" x 14) and outside bushing diameter (1.6") match your existing joint before ordering.