MetalCloak Upper Control Arm Install: The Ultimate Jeep Death Wobble Fix
Updated: Aug 28
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📌 TL;DR / Quick Summary
Correct Caster, Stop the Wobble: Lifting your Jeep alters suspension geometry and pushes positive caster out of spec, causing “flighty” highway handling and death wobble; heavy-duty adjustable upper control arms dial the geometry back in.
Superior Construction & Duroflex Tech: Swapping weak stamped-steel OEM arms for 1¼" DOM steel MetalCloak uppers adds forged chromoly strength and Kevlar-infused Duroflex joints that absorb extreme road vibration and flex off-road without wearing out.
Essential DIY Tips & Clearance Workarounds: Install one arm at a time at ride height to stop the axle from shifting, reuse/trim the factory 18mm bolt if the new passenger-side shoulder bolt doesn't clear, and only torque to 80 lb-ft under full vehicle weight.
Finish at the Alignment Shop: Use the bench “Match-Up” method to safely drive out of the garage, then get a professional 4-wheel alignment to lock in perfect caster and protect your tires.
What You Will Learn In This Post
If your lifted Jeep Gladiator or Wrangler suffers from flighty steering, highway wander, or violent Death Wobble, this guide breaks down why factory upper control arms fall short and how heavy-duty adjustable replacements restore front-end stability. You’ll get a deep dive into suspension geometry, understanding exactly how positive caster acts as the “secret sauce” to bring back natural return-to-center steering feel after installing a lift kit.
We’ll compare the engineering differences between thin OEM stamped steel and MetalCloak’s DOM steel arms featuring vibration-dampening, Kevlar-infused Duroflex joints. You will also get a practical, trade-tested walkthrough of the complete garage installation—covering essential tools, heat shield removal, torque specs, and how to manage the notorious passenger-side exhaust clearance hurdle on both gas and EcoDiesel models.
Finally, you’ll learn the exact garage baseline steps to safely transition your rig from the workbench to the alignment rack. From managing axle tension with a floor jack to post-installation torque checks, this article delivers the actionable knowledge you need to tackle this suspension upgrade with confidence and eliminate steering instability for good.
Why Adjustable Upper Control Arms are a Crucial Jeep Death Wobble Fix
When your Jeep starts shaking like a 7.0 on the Richter scale, you know you need a permanent fix. After installing a Mopar 2-inch lift on my 2022 Gladiator, the steering became "flighty." This happens because lifting the vehicle alters the suspension geometry, specifically pushing the caster angle out of its ideal range.
To tackle this, I swapped the stock control arms for MetalCloak adjustable uppers. They’re beefy—6 lbs compared to the 4 lb factory units. Built from 1 1/4" x 3/16" DOM steel with a gold zinc finish, they’re made for the rugged New Mexico trails.
But the real game-changer? The patented Duroflex joints. They provide incredible off-road flex and high vibration dampening without the maintenance or wear issues of standard bushings.
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Restoring Caster Angle: The Secret Sauce
Think of Positive Caster as the secret sauce that stops your Jeep from feeling like you're wrestling a caffeinated squirrel at 70 mph. When you lift a Jeep, that steering axis tilts forward. Adjustable control arms allow you to tilt the top of your steering pivot back toward the rear—exactly like the red line in the diagram. This tilt gives your steering that "snap-back" feel where the wheels naturally want to return to center.
A Key Jeep Death Wobble Fix After a Mopar 2-Inch Lift
Adjustable control arms are the secret to dialing in your rig’s geometry. After researching the best way to tackle my Gladiator's steering issues, I decided to go with MetalCloak suspension parts as my primary Jeep Death Wobble fix.
When I mentioned to the Tech at MetalCloak that I had already installed the Mopar Bilstein 2" Lift Kit, he pointed out something critical: while that kit includes longer lower control arms, it keeps the factory uppers. He recommended these adjustable upper control arms to fully restore the Positive Caster. It’s a small adjustment that goes a long way toward making the Gladiator a rock-solid daily driver and a beast on the trails, so I added them to the build.
See The Next Installation Article in the Death Wobble Series - Steer Smarts Sector Shaft Install
MetalCloak vs. OEM: Comparing the Build Quality
You don't have to be an engineer to see that a forged chromoly adjustable end and DOM tubing beats the heck out of a stamped steel OEM unit. While stamped steel works for "pavement princesses," it can’t compete with 1/4" thick axle brackets and Kevlar-infused joints.
The Power of Duroflex Joints and Kevlar
Performance-tested on a shaker table, the Duroflex joint is designed to outperform the competition while remaining maintenance-free and fully rebuildable. It's the best of both worlds: you keep that smooth OEM ride on the highway but get serious articulation on the trails. By compounding DuPont™ Kevlar® into the joint's material, MetalCloak has created a setup with "High Vibration Dampening" that is significantly more durable than standard rubber or poly bushings.
Step-by-step Installation Tips for the DIYer
Step 1: Safety First & Suspension Setup
Warning! Only remove one control arm at a time to keep the axle from shifting. I recommend leaving the Gladiator on its tires (at ride height) rather than on jack stands. This keeps the suspension at its natural resting point so you aren't fighting "stretch" or binding later. Use wheel chocks and make sure that Jeep isn't going anywhere before you crawl under.
Step 2: The Tool Kit
You'll need a good mix of metric and SAE for this job. Grab your 10mm, 18mm, and 24mm sockets and a heavy-duty ratchet. Speed wrenches (10mm and 18mm) are going to be your best friends for those tight spaces. You'll also need a high-quality Torque Wrench and potentially a Sawzall with a metal-cutting blade and a drill motor with a fresh bit for the passenger side frame bolt. I also found myself reaching for Vise-Grips and a large Crescent wrench—so keep the whole chest nearby!
Step 3: Clear the Way (Heat Shields)
Remove the aluminum heat shields that protect the upper control arm bushings from exhaust heat. These are held on by 10mm bolts. I found the driver-side shield a bit easier to pull than the passenger side, even though the driver's side is more congested with exhaust plumbing. That 10mm speed wrench is a lifesaver here.
Step 4: The "Loose Nut" Strategy
Straight out of the MetalCloak playbook: Loosen, but do not remove, all four control arm bolts before you fully pull any single arm. Giving yourself that little bit of "wiggle room" across the whole system makes it much easier to slide the new beefy arms into place.
Step 5: Dialing in the Length (Baselines)
Unless you have a laser-level in your brain, you’ll want to head to an alignment shop to perfectly set your Caster. To get from the garage to the shop safely, use the "Match-Up" method: pull one OEM arm, lay it on the bench, and adjust your new MetalCloak arm to match the factory eye-to-eye measurement exactly. Don't forget to coat those threads with anti-seize—your future self will thank you.
Step 6: Installing the New Arms
Install the new control arm using the OEM hardware (where applicable). I had to tweak the length just a hair to get the holes to line up while the Jeep was on its wheels. Reaching the axle bolt on the driver's side is a bit of a jigsaw puzzle because the differential is in the way, whereas the passenger side is much more open. Keep all bolts finger-tight until both arms are in.
Step 7: The Passenger Side Bolt Battle
The passenger-side frame bolt is famous for being blocked by the exhaust. On my EcoDiesel, I caught a break and was able to slide it out over the DPF, but gas-powered Jeeps usually require cutting that bolt out. MetalCloak includes a new 3/4" shoulder bolt for this spot. I found the shoulder of the new bolt was a hair too large for the frame hole. You can either drill the hole out to fit the new shoulder or, if you were lucky enough to remove your OEM 18mm bolt without cutting it, just reuse the factory hardware. I chose to stick with the OEM bolt.
Step 8: Torque Specs From Mopar
Once everything is lined up, it’s time to tighten. Crucial Tip: The Jeep must be sitting on its own weight on the ground before you do the final torque. If you torque it while the suspension is drooping, you’ll ruin those expensive bushings. These specs were included in the directions I got with my Mopar Bilstein Lift Kit.
Frame Side: 80 lb-ft
Axle Side: 80 lb-ft
(Note: Always double-check your specific year's manual, as some factory specs call for a torque-plus-angle turn). Pro Tip: Drive it for 50 to 100 miles, then get back under there and re-torque everything.
Step 9: Professional Alignment
Final step: get to the alignment shop. If you’re using the "Nuclear Option" like I am to defeat Death Wobble, a full professional alignment is the only way to ensure your geometry is perfect and your tires aren't being chewed up.
Managing the Frame-Side Bolt Clearance Issues
The passenger side Upper Control Arm at the frame point of connection requires some extra attention. The OEM bolt is too long to take out past the Gladiators exhaust without cutting. I was barely able to get minie out past the amuminum cladding on the DPF. Installation of the new bolt is performed by passing it through the frame opening. I found the threads of the MetalCloak provided bolt passed through the provided bolt hole but the shoulder was to large a diameter.
I had 2 choices:
Drill out the interior bolt hole to accomodate the 3/4" bolt form MetalCloak.
Use the OEM 18 mm bolt.
I chose to use the 18 mm bolt and since it protruded so far towards the exhaust I cut it off.
Measurement vs. Reality: The "True Length
If you’ve ever pulled a factory control arm bolt and watched the axle housing shift, you’ve witnessed Suspension Tension in action. Even on level ground, your suspension is in a constant state of tug-of-war. Don't fight the arm—use a floor jack to rotate the axle until the holes line up.
Tech Note: The "Tug-of-War" – Why Your Axle Shifts
If you’ve ever pulled a factory control arm bolt and watched the axle housing rotate or shift a fraction of an inch, you’ve witnessed Suspension Tension in action. Even when the Jeep is sitting on its own weight on level ground, your suspension is in a constant state of "tug-of-war.
Conclusion: The "Nuclear Option" Verdict
Solving Death Wobble and flighty steering isn't about throwing parts at the problem; it’s about restoring proper geometry with components that can actually handle the stress. Moving from stamped steel to forged chromoly and Kevlar-infused Duroflex joints isn't just an "upgrade"—it’s peace of mind. As a retired sheet metal worker, I’ve spent my life respecting the math of True Lengths and precise layouts. Applying that same mindset to my Jeep’s suspension reminded me that the "Reality" under the chassis only works if you respect the "Measurement" on the bench.
Can You Do It?
If you’re a DIYer staring at your front axle and wondering if you can handle this install, the answer is yes. Take your time, trust your bench measurements as a baseline, and don't be afraid to use that floor jack to win the "Tug-of-War" with your axle. It’s a rewarding project that pays off every time you hit the highway or the trail.
Join the Conversation
If you want to see the full "Nuclear Option" install in action—including the "drift pin" tricks and the EcoDiesel bolt clearances—head over to the Muddy Ruttzz YouTube channel. Don't forget to subscribe to the Muddy Ruttzz Gazette for more DIY builds and overlanding adventures from the garage.
About The Author:
Muddy Ruttzz is a digital creator, overlander, and DIY builder documenting rugged vehicle builds and outdoor adventures. Backed by a career in industrial sheet metal fabrication, heavy infrastructure construction, and mechanical maintenance, he provides practical, trade-tested technical guides for real-world off-road performance.
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