A Practical Guide to Universal Joints for the 1963-1970 Jeep Gladiator
Keep your classic Gladiator's drivetrain reliable by understanding, identifying, and replacing worn U-joints.
- Dana Spicer is the top-tier replacement brand, as they were the original manufacturer for Jeep.
- Symptoms like clunking, vibrations, and squeaking should be addressed immediately to avoid a driveshaft failure.
- Your Gladiator has multiple U-joints; be sure to identify the correct part for the driveshaft or axle shaft location.
- You must choose between greasable joints that require maintenance and stronger, non-greasable sealed joints.
Symptoms of a Bad U-Joint
A failing U-joint will give you clear warning signs. Ignoring them can lead to a driveshaft separating from the vehicle, causing significant damage and a loss of control. Listen and feel for these common symptoms:
- Clunking Noises: A loud "clunk" or "bang" when you shift from Park into Drive or Reverse is a classic sign of a worn U-joint with too much play.
- Vibrations While Driving: A vibration that you can feel through the floor or seat that gets worse as you increase speed often points to a failing U-joint. This is sometimes confused with an unbalanced tire, but U-joint vibration is often more pronounced during acceleration.
- Squeaking or Chirping: A rhythmic, bird-like squeak that matches the rotation of your driveshaft (getting faster as you speed up) usually means the U-joint has lost its grease and is running dry. This is an early warning sign.
- Visible Rust or Leaks: If you look under your truck, you might see rust-colored dust around the U-joint's bearing caps, which indicates water has gotten inside and the internal needle bearings are failing.
Choosing the Right Aftermarket U-Joint
For a vintage vehicle like the 1963-1970 Gladiator, new OEM parts from Jeep are no longer available. However, the original supplier for many Jeep components was Dana Spicer, and their parts are available on the aftermarket. This makes choosing a high-quality replacement straightforward.
Identify the Correct Part
Your Gladiator has different U-joints for the driveshafts and the front axle shafts. Always confirm the specific part number for the correct location before ordering. Many J-series trucks of this era used 1310-series U-joints for the driveshafts.
Brand Tiers for Your Gladiator
Based on owner experiences and brand reputation, aftermarket U-joints generally fall into these tiers:
- Top Tier (OEM Quality): Dana Spicer. Spicer was the original manufacturer for Jeep U-joints. Choosing a Spicer replacement is like getting an original part. They are widely considered the most durable and reliable option by Jeep enthusiasts. They offer both greasable and non-greasable versions. Some off-roaders prefer the non-greasable (sealed) joints, believing the solid-body design is stronger.
- Mid-Tier: Moog. Moog is a well-known aftermarket brand that has historically been a go-to for suspension and steering parts. However, some forum users have noted a decline in consistent quality in recent years. While still a viable option, they are generally not considered to be on the same level as Dana Spicer for this application.
- Economy Tier: GMB. GMB offers a functional, budget-friendly replacement. If the truck is used lightly or you have a strict budget, GMB will get the job done. For heavy use, off-roading, or maximum longevity, investing in a higher-tier brand is recommended.
Greasable vs. Non-Greasable
Greasable U-joints have a zerk fitting that allows you to add new grease, which can extend their life if done as part of regular maintenance. Non-greasable (sealed) joints are maintenance-free but must be replaced when they wear out. The solid cross of a non-greasable joint is technically stronger than one drilled for a grease channel.
Replacement Cost Overview
The cost to replace a U-joint depends on the brand you choose and whether you do the work yourself or hire a shop. The parts themselves are relatively inexpensive.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $18 - $122 |
| Shop Labor | $150 - $300 per joint |
Frequently Asked Questions
How many U-joints does my 1963-1970 Gladiator have?
Typically, a 4x4 Gladiator will have a total of six U-joints. There are two on the rear driveshaft, two on the front driveshaft, and one in each front axle shaft near the wheels. Some configurations may vary.
Is replacing a U-joint a DIY job?
For an experienced home mechanic, yes. The process involves removing the driveshaft or axle shafts. You will need a special tool, like a ball-joint press, or a large bench vise and appropriate sockets to press the old joint out and the new one in. It can be difficult if the parts are rusted together.
Are there any recalls for my Gladiator's U-joints?
No. There are no active or historical recalls or Technical Service Bulletins (TSBs) related to universal joints for the 1963-1970 Jeep Gladiator. Failure is typically due to age and normal wear.
Should I replace all the U-joints at once?
If you find one bad U-joint, it's a good idea to inspect the others carefully. If they are all original, they likely have similar amounts of wear. If your budget allows, replacing them all at the same time, especially the ones on the same driveshaft, can save you from having to do the same job again in the near future.
Technical Specifications
Common driveshaft U-joints for this application are 1310 series. Axle shaft U-joints may use part numbers like 5-260X or similar, depending on the specific Dana axle model (Dana 27 or Dana 44). Always verify fitment by the specific location on your truck.
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.