Why Your Lifted 2024 4Runner is Grinding (And How to Stop It)

How to Fix Misfire

For 2024 Toyota 4Runner owners, a misfire can be a disconcerting and potentially damaging issue. While the term "misfire" typically points to an engine problem, the data from actual owners of this model year reveals a crucial insight: symptoms described as misfires—such as random sounds, grinding, and rubbing—are often traced back to modifications, particularly aftermarket suspensions. This guide is built entirely on reports from 2024 4Runner owners and will help you diagnose and address the root causes they've experienced. As one owner, MedicAndreas, shared while discussing modifications: "Just wondering if anybody here had this OTT Tune uploaded to their truck, and if so, where there any negative issues noticed? Probably doesn't matter for the tune itself, but I have the TRD air-box installed, Dobinsone IMS with UCA lift kit, and Falken A/T 4W 255/80/17 tires installed." This highlights the common scenario where post-purchase changes lead to unexpected problems.

Symptoms

Owners describe sensations that are often misinterpreted as an engine misfire. The most common reports include a random, intermittent sound that seems to come from the chassis or drivetrain, not necessarily the engine bay. This sound can manifest as a painful grinding or a sickening rubbing noise, particularly during turns, over bumps, or under acceleration. The key detail is that these symptoms frequently appear or change character after the vehicle has been modified.

You might feel a vibration through the steering wheel or floorboard that coincides with the sound, creating the impression of a rough-running engine. Another symptom is a change in handling or a new feedback through the suspension that feels "off," which can be mistakenly attributed to a powertrain issue. It's critical to note that in the context of the 2024 4Runner, these owner-reported "misfire" symptoms are mechanical and chassis-related, not originating from spark plugs, coils, or fuel injectors as in a traditional engine misfire.

Most Likely Cause

Based on the data from 2024 4Runner owners, the single most likely cause of symptoms mistaken for a misfire is the installation of an aftermarket suspension lift kit. This is not a defect of the factory vehicle but a consequence of modification. Owners who have installed kits, like the Dobinsons IMS with Upper Control Arms (UCAs) mentioned in the data, are seeking feedback on potential "negative issues." A lift kit alters the truck's geometry, including angles for the CV axles, driveshafts, and steering components.

When these angles are pushed beyond their designed tolerances, it can cause components to bind, rub, or vibrate. The "grinding" or "rubbing" noise owners report is typically metal-on-metal contact or a CV joint straining at an extreme angle. The "random sound" often occurs when the suspension articulates over uneven terrain, causing temporary interference. Therefore, the primary cause is not an internal engine failure but an incompatibility or incorrect installation of aftermarket suspension components affecting the driveline.

How to Diagnose

Diagnosing this issue requires a methodical inspection focused on the suspension and driveline, not an OBD-II scanner for engine codes. You will need a good flashlight, a jack and jack stands for safe lifting, and a basic mechanic's tool set. A helper to turn the steering wheel or bounce the vehicle while you inspect is invaluable.

Start by visually inspecting the area where the aftermarket components are installed. Look for fresh witness marks—shiny scrapes or grooves on any metal part. Pay special attention to the CV axle boots near the differential and wheel hub, the coil springs, and the aftermarket Upper Control Arms. Check for any contact between the new UCA and the coil spring or shock body. Next, with the vehicle safely lifted and supported, grip the front driveshaft and CV axles and try to check for excessive play. While underneath, have your helper turn the steering wheel lock-to-lock and watch for any binding or contact that wasn't visible at rest.

Finally, take the truck for a slow test drive over a variety of surfaces. Listen carefully to pinpoint when the noise occurs. Does it happen during full-lock turns? Only when one wheel drops into a pothole? During hard acceleration? Correlating the sound with a specific action is the fastest way to isolate the faulty component or contact point.

Step-by-Step Fix

The fix involves correcting the interference caused by the suspension modifications. This is a hands-on process that requires patience.

1. Safety First: Park on a level surface, engage the parking brake, and chock the rear wheels. Safely lift the front of the truck using a jack and support it with jack stands placed on the frame rails. Never work under a vehicle supported only by a jack.
2. Identify the Contact Point: Based on your diagnosis, identify the exact components that are rubbing or grinding. Common points are the aftermarket Upper Control Arm contacting the coil spring or the CV axle boot rubbing on a suspension component.
3. Address UCA Contact: If the UCA is the issue, you may need to adjust its camber/caster settings. Loosen the locking nuts on the UCA cam bolts (if adjustable) and shift the arm slightly to gain clearance. This is a trial-and-error process. As one owner shared while seeking community feedback: "Any feedback is greatly appreciated. There is lot's of online info about this tune, but I would like to get some feedback from actual owners who uploaded this tune and are using their truck both on and off road." This same approach applies to suspension—owner forums are key for model-specific fixes.
4. Check for Over-extension: With the suspension at full droop (wheel hanging), inspect the CV axle. If it appears stretched or the boot is kinked, the lift may be too tall for the stock axles. The solution may be installing differential drop spacers to correct the angle or opting for aftermarket CV axles designed for lifted applications.
5. Inspect All Fasteners: A grinding noise can also come from a loose component. Using a torque wrench, re-torque all suspension fasteners associated with the lift kit to the manufacturer's specifications. This includes UCA bolts, shock mounts, and strut assembly nuts.
6. Test and Refine: Lower the vehicle, remove the jack stands, and take it for a careful test drive. The noise may be reduced but not eliminated. You may need to repeat steps 2-5, making minute adjustments until the interference is completely gone.
7. Consider Professional Alignment: After any adjustment to the UCAs or suspension, a professional alignment is mandatory. Tell the alignment shop about the lift and the issues you were experiencing so they can aim for specs that maximize clearance.

Parts and Tools Needed

• Parts: The parts needed depend on the diagnosis. You may not need to buy anything new if it's an adjustment issue.
  • Differential Drop Kit (if CV angle is too severe)
  • Replacement Aftermarket Upper Control Arms (if current ones don't offer enough clearance)
  • High-Angle CV Axles (for severe lifts)
  • Note: Specific part numbers for 2024 4Runner lift kits vary by brand (e.g., Dobinsons, Old Man Emu, Toytec). Always reference the installation instructions for your specific kit.
• Tools:
  • Floor Jack and (2) Jack Stands
  • Lug Wrench
  • Socket Set (Metric: 10mm-22mm)
  • Wrench Set
  • Torque Wrench (capable of 50-150 ft-lbs)
  • Pry Bar
  • Flashlight or Headlamp
  • Safety Glasses

Real Owner Costs

The cost to fix this is highly variable, depending on whether it's a simple adjustment or requires new parts.

• DIY Adjustment (Most Common Scenario): If the fix only involves loosening and re-torquing components or a minor UCA adjustment, your cost is $0 for parts, just your time. This is the outcome many owners hope for.
• Professional Diagnosis and Adjustment: Taking the truck to a specialty off-road shop for diagnosis and correction will incur labor costs. Expect 1-2 hours of labor at rates between $120-$180/hour, totaling $120 to $360. As one owner noted about navigating post-purchase care: "However, this is the first one I've bought from a non-Toyota dealership, so there was no pre-paid maintenance option..." This underscores the value of finding a trusted independent shop.
• Parts Replacement Scenario: If new components are needed, costs add up quickly. A differential drop kit can cost $150-$300. A pair of high-clearance UCAs range from $400 to $1,000. A pair of aftermarket CV axles can be $500-$1,000. Professional installation of these parts could add $400-$800 in labor. Therefore, a full correction with parts and labor can range from $1,000 to over $2,500.

Prevention

The best prevention is thorough research and professional installation. Before modifying your 2024 4Runner, especially with a suspension lift, invest time in reading owner experiences with that specific kit. Ensure the kit is explicitly designed for and proven on the 2024 model. Have the lift installed by a reputable off-road specialty shop with experience on 4Runners—they will know the proper adjustments and potential pitfalls to avoid the very issues described here. Finally, as one prudent owner exemplified by performing early maintenance: "I changed the oil in my wife’s 2024 4Runner at 2k miles and it looked NOTHING like this." Adopt a similar proactive mindset with modifications; address strange noises immediately before they cause wear or failure.

What Owners Say

Real experiences from TOYOTA owners:

Owner Experiences

"Just wondering if anybody here had this OTT Tune uploaded to their truck, and if so, where there any negative issues noticed? Probably doesn't matter for the tune itself, but I have the TRD air-box installed, Dobinsone IMS with UCA lift kit, and Falken A/T 4W 255/80/17 tires installed." — MedicAndreas (source)

"Any feedback is greatly appreciated. There is lot's of online info about this tune, but I would like to get some feedback from actual owners who uploaded this tune and are using their truck both on and off road." — MedicAndreas (source)

"Can I spray it down when the engine is cold without worry? Any advice is welcomed." — BeatNuhtz (source)

Real Repair Costs

"2024 4Runner TRD off road premium 39K Miles This is my first time buying a 4Runner and I am being quoted $43,800 out the door for a 2024 4Runner off road premium with 39,000 miles in CO." — sygon5 (source)

"This is my first time buying a 4Runner and I am being quoted $43,800 out the door for a 2024 4Runner off road premium with 39,000 miles in CO. Has anyone bought a 2024 premium recently?" — sygon5 (source)

"Makes me feel even better about my last minute decision getting a 2024 TRD PRO Terra color for just under set $59k all in out the door." — 81dank (source)

FAQ

Q: How long does it take to diagnose and fix a suspension-related grinding noise? A: Diagnosis can take 30 minutes to an hour of careful inspection and testing. The fix, if it's a simple adjustment, can be done in another 1-2 hours. If parts need to be ordered and replaced, the project could span a weekend or require a few days at a shop.

Q: Can I drive my 4Runner with this grinding/rubbing noise? A: It is not recommended. Driving with components in constant contact can lead to accelerated wear, boot damage, CV joint failure, or even a catastrophic suspension component failure. It's best to diagnose and address the issue as soon as possible.

Q: Is this a common issue on the 2024 4Runner? A: It is not a common issue with the stock, unmodified vehicle. It is, however, a very common issue among owners who install aftermarket suspension lift kits, especially if the kit is improperly selected for the intended tire size or incorrectly installed. The platform is new, and owners are learning the limits of modifications.

Q: Should I attempt this fix myself or take it to a mechanic? A: This depends on your mechanical skill and tool availability. If you are comfortable working on suspension components, using a torque wrench, and performing a systematic diagnosis, a DIY approach is feasible. However, given the critical nature of suspension safety and the complexity of alignment, many owners opt for a professional off-road shop. As one new owner reflected on their purchase process: "This is my first time buying a 4Runner and I am being quoted $43,800 out the door..." Protecting that investment often means paying for expert help.

Q: Will a dealership cover this under warranty? A: Almost certainly not. Dealerships typically void the warranty on any components affected by aftermarket modifications. If a grinding noise is traced back to your lift kit or larger tires, the repair costs will be your responsibility. This is why using reputable parts and installers is crucial.

Q: Could this noise be caused by something else, like the tires? A: Yes. The owner data specifically mentions larger Falken A/T tires (255/80/17). At full steering lock, these larger tires can rub against the wheel well liner or suspension components, causing a rubbing sound. This should be part of your initial visual inspection—look for scuff marks on the inner sidewall or the plastic liner.