Made in USA
Orem, Utah
Lifetime Guarantee
Unconditional
10 Colors
In-house powder coat
Ships in 3 Days
From our UT facility
Fully Adjustable
0-6" of lift
3 X-Series Options
Only Core 4x4
Why Builders Choose CORE 4X4
Warranty facts, not marketing language.
vs. MetalCloak
Their “lifetime” language refers to their service model. Actual parts warranty: 1 year. Ours: lifetime.
vs. Teraflex
Skip a maintenance interval? Their warranty voids. Ours doesn’t.
vs. Clayton Off Road
Clayton warrants their Johnny Joints for 90 days. We cover ours for life.
Unmatched Rear Axle Stability Suspension Control
Upgrade your Toyota 4Runner (2003-Present) with the Crawl Series Rear Track Bar, designed to provide exceptional axle centering, improved handling, and superior articulation. Whether you’re conquering tough off-road trails or maintaining control on the highway, this adjustable track bar ensures precise alignment correction and minimizes lateral axle movement for a smoother ride.
What's Included?
- Crawl Series Rear Track Bar (CRL-T-4R-03-RTB1)
Key Features and Benefits
- Heavy-Duty DOM Tubing Construction – Built from 1.5” OD DOM Tubing with a 5/16” wall thickness, this track bar provides exceptional strength and durability, surpassing factory and aftermarket alternatives.
- Forged Joints for Maximum Performance – Equipped with forged Johnny Joints at both ends, this track bar offers unmatched flexibility and vibration dampening while preventing binding during articulation.
- Left- and Right-Hand Threaded Adjustability – Designed for on-vehicle fine-tuning, this track bar allows for quick and precise axle re-centering and suspension adjustments without removal.
- Fully Adjustable for Lifted Vehicles – Accommodates 0 to 6 inches of lift, ensuring optimal axle positioning and improved suspension geometry. For lifts beyond 6 inches, contact us for additional solutions.
- Recommended Pairing – Pair with the Crawl Series Rear Control Arms Set (CRL-T-4R-03-RS4) for a complete rear-end suspension solution, giving you absolute control over axle centering, pinion angles, and suspension geometry.
Two-Stage Powder Coating for Maximum Protection
To ensure long-lasting durability and corrosion resistance, all track bars undergo a two-stage powder coating process.
Zinc Primer Base Coat – Provides superior rust prevention.
Durable Top Coat – Available in 10 custom colors for added protection and personalization.
Made in the USA
Manufactured in Orem, UT, the Crawl Series Rear Track Bar is built to the highest standards of American craftsmanship. By choosing CORE 4X4, you’re investing in a locally made, high-quality product designed to withstand the most demanding conditions.
In Conclusion
The Crawl Series Rear Track Bar (CRL-T-4R-03-RTB1) is the ultimate upgrade for Toyota 4Runner owners looking to optimize axle alignment, improve suspension articulation, and maximize durability. With on-vehicle adjustability, superior strength, and long-lasting performance, this track bar provides exceptional handling and control for any terrain. Upgrade today and take your 4Runner’s performance to the next level!
| Make | Model | Submodel | Years |
|---|---|---|---|
| Toyota | 4Runner | 1996 - 2024 |
Each rebuild kit includes all necessary components to replace and restore wearable parts.
| Vehicle | Toyota 4Runner (96–24) |
| Brand | CORE 4X4 |
| Color | Black or Blue or Charcoal or Green or LightGreen or Orange or Purple or Red or White or Yellow or Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Series | Crawl Series |
| Lift Size | 0" — 6" or 6"+ |
| Hardware | No Hardware or Complete Kit |
Select your lift size in Step 1 — the kit ships with the correct geometry for that height. If you’re running a non-standard setup, call us before ordering and we’ll confirm compatibility.
Death wobble is a geometry problem, not just worn parts. Cruise Series corrects caster angle and eliminates the flex points that let shimmy start. Replacing one part at a time delays the fix — this replaces the geometry.
Yes, if you’ve done a lift kit before. Full-day project. Watch the complete JT install walkthrough on our YouTube channel — most owners wrap it in a day. Any off-road shop can run it if you’d rather have it done.
Any non-wear component fails — we replace it. No mileage cap. No maintenance intervals to track. No fine print about voiding if you miss a service. Lifetime means lifetime.
Teraflex’s lifetime warranty voids if you miss a maintenance interval. MetalCloak’s actual parts warranty is 12 months — their “lifetime” language refers to their service program. No conditions here.
See It Installed
Install videos and build guides on our YouTube channel.
Watch more installs on YouTube
Reviews from Google
5.0
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132 reviews
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Brantly Musgrave
Jan 22, 2026
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First and foremost would like to say that Core4x4s customer service is top notch and they definitely stand behind their warranty on products! Highly recommend using them for any of your off road needs! It’s rare to find a company now a days that backs their products and they do!
Had a few issues with mounts and control arms and they handled it without hesitation! Thank you!
WT
William Turton
Nov 23, 2025
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Finally a company with a great product and customer service to match. I changed my order last minute from short arms to long arms. The lift is extremely well built. Korbey was awesome! Highly
recommend Core 4x4
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Zion
Sep 24, 2025
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Every product I have received from them has been nothing short of fantastic. Korby in Customer service went above and beyond to help me fix my own mistake. I cannot reccomend them enough.
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Aaron
Mar 23, 2024
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I have recently come to know Core 4x4 when I purchased a Jeep XJ and was looking for a place that had dedicated XJ suspension and components. Here is what makes them different than most other shops. All of their components are top shelf quality and they back it up if you break any of it. I was able to see their shop when I picked up an order locally and was impressed with their attention to detail and how they assemble and powder coat each part. I had an issue with a shackle and needed the threaded shaft to be shorter. I called in and talked to Kaden and he told me to come by and they would shorten it for me. When I got there, Kaden and Spencer (the owner) met me and talked about options and proceeded to make the right adjustments to fit my XJ. Told me if anything changes in the future and I need additional length, they would take care of me. So what really sets them apart from others is their Customer Service. Try calling in to any other Jeep suspension or part shop and see how they treat you. Been there - done that.
Will continue to do business with Core and their team. Getting that kind of service for just a shackle has me thinking I may need to replace my JT components with Core's. Thanks Guys for being helpful good humans!
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Noah Myers
Mar 23, 2024
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I contacted these guys on a Saturday through email and needed some control arms by the following weekend, Spence got back with me and told me he would make sure the order got shipped out on Monday, they got busy and wasn’t able to ship the package out so he got back with me that evening and upgraded my shipping for free and shipped out the next day, only because he told me he’d make sure I’d have them by the weekend! This company sticks to their word! The customer service from these guys are unmatched and they will have another lifetime customer here!
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Sal Torres
May 27, 2025
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upper control arms look great and went on easy.. only reason I gave 4 stars and not 5 is because of a shipping issue which put my build a week behind. The issue was resolved quickly and painlessly, great customer service. Only time will tell how control arms perform but they look great and like they will go above and beyond control arm demand.
JJ
JT JT
Dec 23, 2025
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We have all shopped places where the person on the phone makes you feel like they don't have the time to talk to you the customer or answer your questions. I can tell you first hand that's not Core 4x4. They have the best customer service I have seen so far. They have taken the time to respond to all of my questions in a very prompt and professional manner, taking the time to answer each and every question I have had. Lets put it this way if Core 4x4 sells a product I am wanting for my truck I will buy it from them, I highly recommend Core 4x4.
MB
Melody Baker
Jan 22, 2026
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I ordered a part for my 03 Jeep TJ and all I can say is wow! Korby at Core 4x4 is a total rockstar!! There was a glitch with my payment and within minutes, Korby reached out to me to get it fixed, then sent my receipt with the tracking number. I lost the number and reached out to him during the Holidays and got a rapid response with the number again. I can’t say enough about the customer service and the quality of parts. Thank you!!
PG
Paul Griffin
Feb 21, 2026
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Great long arm kit with everything else I needed as well! They worked with me to ensure that I was getting an upgraded components kit just like I wanted. Fast shipping with some of the best packaging that I have ever seen. Nothing was scratched or missing and this kit is even more impressive than the videos or website can show. Powder coating looks great with no issues.
I would highly recommend CORE 4x4 to anyone looking for a great quality kit.
CL
Cade Leith
Mar 23, 2024
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Have full upper/lower CA set on both front and rear axles on a 96 ZJ. These are the rubber bushing sets not joint sets. I have beat the hell out it in the Nevada desert for 2 years and has been great. I don’t go fast but I do articulate suspension a lot. Super solid and haven’t any issues. Just inspected the entire set recently due to some banging under it. Turns out the banging is lower rear shock bushings. Inspected each CA along the way nothing. Aside from dirt and obviously winter roads and what not still in excellent condition, bushings are solid like the day they were installed. I’ll add that I’m about tapped on a short arm at 4.25(less with settle) so the front CA’s get beat on just from that, still they’re like new. Paint is great condition, this set is red. I would definitely buy again. Another plus for me, Utah isn’t local necessarily, but it’s nice to support businesses closer to me.
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Specifications
| Color | Black, Blue, Charcoal, Green, LightGreen, Orange, Purple, Red, White, Yellow, Custom Color - Other than what is listed above. Extra charge varies. We will reach out after order is placed. |
| Lift Size | 0" — 6", 6"+ |
| Hardware | No Hardware, Complete Kit |
| Vehicle | Toyota 4Runner (96–24) |
| Brand | CORE 4X4 |
| Series | Crawl Series |
| Note to Core4x4: | - |
| Tags | |
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