Jeep Gladiator Universal Joint Replacement Guide (2020-2022)
Hearing clunks or feeling vibrations? Your Gladiator's U-joints might be the problem.
- A clunk when shifting or a vibration at speed are key signs of a bad U-joint on your Gladiator.
- A recall for the 2020 model highlights the danger of a U-joint failing from lack of grease.
- Dana Spicer is the OEM supplier and offers the same quality as Mopar, often for less money.
- Before buying, check if your front axle uses U-joints or CV joints, as some models differ.
Is Your Gladiator's U-Joint Failing?
A U-joint is a wear-and-tear item. Off-roading, heavy loads, and even daily driving eventually take their toll. Because a complete failure can leave you stranded or cause more damage, it's important to recognize the warning signs. Listen to your truck; it will usually tell you when something is wrong.
Known Issue: 2020 Gladiator Driveshaft Recall
A safety recall (NHTSA Campaign ID: 19V636000) was issued for some 2020 Jeep Gladiators. The rear driveshafts may have been assembled without grease, which could cause the joint to overheat, seize, and potentially break. This could lead to a sudden loss of power or the driveshaft falling onto the road. 🎬 See this walkthrough on how to change driveshaft U-joints The fix was a complete driveshaft replacement by the dealer. While this recall work should be complete, it highlights the importance of grease in a U-joint's life.
Symptoms of a Bad Universal Joint
Pay attention to these signs. Ignoring them can lead to a driveshaft or axle shaft failure, 🎬 Watch this tutorial to save time and money on repairs which is a much bigger and more expensive problem.
- Clunking Noise: The most common symptom is a "clunk" or "ping" when you shift from Drive to Reverse or vice-versa. You might also hear it when you first accelerate from a stop. This is the sound of slack in the worn-out joint.
- Vibrations: A feeling of vibration coming from under the vehicle that gets worse as you speed up is a classic sign of a failing U-joint. Many Gladiator owners report vibrations, and a bad U-joint is a common cause.
- Squeaking Noise: A repetitive squeak that matches the rotation of your wheels, especially at low speeds, often points to a dry, failing U-joint that needs lubrication.
- Red Dust: If you look under your truck and see a fine, reddish-brown dust around the U-joint area, it's a sign the needle bearings inside have turned to dust from lack of grease. At this point, the joint is completely shot.
Choosing the Right Aftermarket U-Joint: Mopar vs. Dana Spicer
When replacing a U-joint, you want a part that is as good as or better than the original. For the Jeep Gladiator, your main choices are Mopar and Dana Spicer.
Brand Quality Comparison
| Brand | Quality & Reputation | Notes for Gladiator Owners |
|---|---|---|
| Mopar | OEM (Original Equipment Manufacturer) | This is the exact part your Gladiator came with from the factory. It guarantees a perfect fit and original performance. However, it is usually the most expensive option. |
| Dana Spicer | OEM Supplier / Top-Tier Aftermarket | Dana is the company that manufactures the axles and driveshafts for Jeep. A Spicer U-joint is often the exact same part as the Mopar one, just sold in a Spicer box at a lower price. They are widely considered by Jeep enthusiasts to be the best and most reliable replacement. |
Pro Tip: Since Dana makes the original parts for Jeep, choosing a Dana Spicer U-joint gives you OEM quality without the OEM price tag. Many experienced Jeep owners prefer Spicer's sealed, non-greaseable joints for maximum durability.
How Much Does a Gladiator U-Joint Replacement Cost?
The cost depends on whether you do it yourself or use a repair shop. The parts themselves are relatively inexpensive, but the labor can add up.
| Expense | Estimated Cost | Notes |
|---|---|---|
| New Aftermarket U-Joint Part | $45 - $240 | The price varies based on location (axle vs. driveshaft) and brand. A single Spicer axle U-joint can be found for around $35-$50, while driveshaft components can be more. |
| Shop Labor | $150 - $300 | Expect 1-2 hours of labor per U-joint. Labor rates vary by location, but this is a common range for this type of job. |
| Total Professional Replacement | $195 - $540 | This is an estimated total for replacing a single U-joint at a repair shop. |
Frequently Asked Questions
Can I replace a U-joint myself?
Yes, if you have mechanical experience and the right tools. You will need a good socket set, a heavy-duty C-clamp or ball joint press, and possibly a torch to remove the old joint. It can be a tough job without a press. If you're not confident, it's better to let a professional handle it 🎬 Watch: How to change your front axle U-joint at home to avoid damaging the new part or the driveshaft.
Do all Gladiators have U-joints in the front axle?
No. Most Gladiators use U-joints, but some models equipped with the full-time 4WD (Selec-Trac) transfer case may have come with CV (Constant Velocity) joints instead. It is critical to visually inspect your front axle shafts at the wheels to see if you have a cross-shaped U-joint or a boot-covered CV joint before ordering parts.
Should I get greaseable or non-greaseable U-joints?
This is a long-standing debate. Greaseable joints can last longer if you regularly maintain them, but many people forget. Non-greaseable (sealed) joints, like the ones from Spicer, are stronger by design (the cross isn't hollowed out for grease channels) and are maintenance-free. For most owners, a high-quality sealed joint is the more reliable choice.
How many U-joints does my Gladiator have?
A typical 4x4 Gladiator has multiple U-joints. There are two in the front axle shafts (one at each wheel), and two or more in the front and rear driveshafts. When you identify a bad U-joint, it's a good idea to inspect the others, as they have all experienced the same amount of wear.
Helpful Videos
Technical Specifications
OEM Part Numbers: 68423294AA 68145053AA 6842329AA
The Jeep Gladiator (JT) uses U-joints for both the driveshafts and, on most models, the front axle shafts connecting to the wheels. These are typically 1350 series or similar-sized joints. Axle shaft U-joints for the Dana 44 front axle have a cap diameter of approximately 1.188 inches. Some models with the Selec-Trac full-time transfer case may use CV joints in the front axle instead of U-joints.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Jeep Gladiator:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Gladiator's U-Joint Failing?
- Known Issue: 2020 Gladiator Driveshaft Recall
- Symptoms of a Bad Universal Joint
- Choosing the Right Aftermarket U-Joint: Mopar vs. Dana Spicer
- Brand Quality Comparison
- How Much Does a Gladiator U-Joint Replacement Cost?
- Frequently Asked Questions
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