Jeep JK Wrangler Front Sway Bar End Link Install

Replace quick-disconnect end links with Core 4x4 crawler series. Johnny Joints at both ends for bind-free articulation on the JK, JL, and JT. Full install with torque specs and grease tips.

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Factory front sway bar end links on the Jeep JK Wrangler, JL, and JT Gladiator are designed for highway driving, not trail abuse. When you disconnect them for off-road flex and reconnect for the drive home, you are adding time and hassle to every trip. Core 4x4 built the crawler series front end links with Johnny Joints at both ends so you can leave them installed on the trail without limiting your articulation.

In this video, Spence from Core 4x4 walks through the full install on an orange JK Wrangler Sport that has been upgraded with a Rubicon sway bar. The job can be done right on the ground with basic hand tools — no jacks or jack stands required. The entire install takes about 20 minutes per side.

Fitment: Jeep JK Wrangler 2007–2018 | JL Wrangler 2018+ | JT Gladiator 2020+ (Rubicon and non-Rubicon with Rubicon sway bar)

Spence from Core 4x4 holding crawler series front sway bar end links with Johnny Joints in front of an orange Jeep JK Wrangler Sport

Why Upgrade Your JK Front End Links

The stock front sway bar end links on the JK, JL, and JT use rigid bushings that bind up when the suspension cycles through its full range. On the trail, most people disconnect them entirely so they can get full articulation. That means every time you hit the trail, you are pulling pins, removing links, and stashing them somewhere — then doing the whole process in reverse before driving home.

The Core 4x4 crawler series end links solve this with Johnny Joints at both ends. Johnny Joints are spherical rod ends that rotate freely in every direction, so the sway bar can move through full flex without binding. You leave them connected on the trail, get your articulation, and drive home without touching a wrench.

What Is in the Kit

Close-up of Core 4x4 crawler series sway bar end links with Johnny Joints and black anodized finish held in front of the JK Wrangler

Each kit includes a pair of front sway bar end links with:

Johnny Joints at both ends — spherical rod ends that allow full articulation without binding or limiting flex
Spacer — included spacer goes between the top joint and the sway bar bracket to match the factory offset and keep the end link sitting vertical when installed
Grade hardware — bolt, washers, and nut included for both mounting points
Zerk fittings — grease fittings on each Johnny Joint for long service life
Color options — available in 10 anodized color options to match your build

These are specifically designed for Rubicon models or any JK/JL/JT that has been upgraded with a Rubicon sway bar. The end links in this video are finished in a custom magma red to match the Jeep’s Pumpkin Metallic paint code — you can request custom colors at checkout or by calling Core 4x4.

Tools Required

18 mm socket and 18 mm wrench (for removing the factory end link bolts)
Ratchet
Sawzall or reciprocating saw (only if factory hardware is seized — see removal notes below)

You do not need jacks or jack stands for this install. It can be done with the Jeep sitting on the ground. Removing the tire makes access easier but is not required — you can turn the wheel to get clearance.

Removal: Taking Off the Factory End Links

Spence kneeling next to the orange JK Wrangler pointing to the front sway bar and factory end link location on the driver side

On this JK, the existing end links were quick-disconnect style (JKS), so Spence started by pulling the pins. If your Jeep still has the stock end links, the process is the same — 18 mm socket and wrench on the top and bottom bolts.

Locate the front sway bar end link connecting the sway bar to the axle bracket
Remove the top and bottom mounting bolts using an 18 mm socket and wrench
Pull the factory end link out

Spence removing the seized factory sway bar end link hardware from the JK Wrangler front axle using hand tools

Seized hardware tip: On this Jeep, the bolts on the back of one pin were seized and would not break loose. Spence had to break out the Sawzall to cut it off. If your factory hardware is corroded, soak it with penetrating oil first. If it still will not budge, cut it off — you are replacing the hardware anyway.

Installation: Bolting On the Core 4x4 End Links

Spence installing the new Core 4x4 crawler series sway bar end link on the JK Wrangler front axle with the spacer positioned on top

Installation is straightforward:

Position the spacer on top — the included spacer goes between the sway bar bracket and the top Johnny Joint. This maintains the factory offset so the end link sits vertical when installed
Thread the top bolt through the sway bar bracket, spacer, and top Johnny Joint
Thread the bottom bolt with washers through the axle bracket and bottom Johnny Joint
Hand-tighten both bolts, verify the end link is sitting vertical
Torque both bolts to 65 ft-lbs
Repeat on the other side

Zerk Fitting Orientation

Before torquing, make sure the zerk (grease) fittings are pointed outward where you can reach them with a grease gun. This is important for long-term maintenance — if the fittings end up buried against the axle or sway bar, greasing becomes a pain.

Torque Specs

Component	Torque Spec
End link mounting bolts (top and bottom)	65 ft-lbs

Close-up of the installed Core 4x4 crawler series front sway bar end link on the JK Wrangler showing the sway bar connection and spacer placement

Greasing the Johnny Joints

Spence wiping excess grease from the newly installed sway bar end link Johnny Joints on the JK Wrangler front end

After installing and torquing both sides, grease the Johnny Joints through the zerk fittings. Just a couple of pumps per joint is enough for the initial break-in. New Johnny Joints are very tight out of the box — it can take a few hundred miles for the grease to fully work in. After the break-in period, add more grease and then maintain on a regular interval of every 10,000 to 15,000 miles.

Use a moly-based grease for all Johnny Joints. Avoid synthetic lithium greases — they do not perform well with Johnny Joints or polyurethane components.

Passenger Side Bracket Tip (JL and JT)

Spence demonstrating the passenger side bracket spreading technique using a breaker bar on a red JL Wrangler factory axle in the Core 4x4 shop

On the JL Wrangler and JT Gladiator, the passenger side lower end link bracket can be a tight fit. The factory bracket may need to be spread open slightly to slide the end link into position. The easiest method is to wedge a breaker bar into the bracket and use leverage to open it up just enough. Once the end link is in and the bolt is torqued down, the bracket pulls back into the correct position.

Note from the product listing: Some widening of the front passenger lower end link mount is required for installation. Bend the mount outward slightly to slide the end link into position. Tightening the bolt will re-straighten the mount to the necessary location.

What Makes These Different from Quick-Disconnect Links

Quick-disconnect sway bar end links have been the go-to solution for years on JK builds. They work — you pull a pin, the sway bar drops, and you get your flex. But they add steps to every trail run and the disconnect points can rattle or wear over time. Here is why the Core 4x4 crawler series is a better long-term solution:

No disconnecting: Leave them installed on the trail. The Johnny Joints allow the sway bar to cycle freely without binding, so you do not sacrifice articulation
No rattles: No pins, no disconnect points, no loose hardware to make noise on the highway
Rebuildable: When the Johnny Joints eventually wear, you rebuild or replace the joints — not the entire end link
Greaseable: Zerk fittings on every joint for easy maintenance
Made in USA: Built right at Core 4x4 with their “you manage to break it, we replace it” guarantee

Frequently Asked Questions

These fit the Jeep JK Wrangler (2007–2018), JL Wrangler (2018+), and JT Gladiator (2020+). They are designed for Rubicon models or any Jeep that has been upgraded to a Rubicon sway bar. Both two-door and four-door models are supported.

No. That is the main advantage of the crawler series end links. The Johnny Joints at both ends allow the sway bar to cycle through full articulation without binding, so you leave them installed on the trail. No disconnecting, no pins to pull, no hardware to stash.

No. This install can be done with the Jeep sitting on the ground. You do not need jacks or jack stands. Removing the wheel gives better access, but you can also turn the steering wheel to move the tire out of the way and work around it.

The spacer goes on the top, between the sway bar bracket and the top Johnny Joint. It accounts for the factory offset so the end link sits vertical when installed on the Jeep. Without the spacer, the end link would sit at an angle and not function correctly. The spacer is included with every kit.

Grease the joints during installation with just a couple of pumps. New Johnny Joints are tight and it takes a few hundred miles for the grease to work in. After the break-in period, add more grease and then maintain every 10,000 to 15,000 miles using a moly-based grease. Avoid synthetic lithium greases.