2023-2026 Jeep Wrangler/Gladiator Rear Axle Oil Leak TSB GPOP 9100749

Jeep has issued Technical Service Bulletin GPOP 9100749 to address a known issue of rear axle oil leaks in certain 2023-2026 Jeep Wrangler (JL) and Gladiator (JT) models. This communication provides specific instructions to technicians on how to correctly repair a Jeep JL JT axle oil leak to ensure a lasting solution.

This bulletin, identified as GPOP 9100749, highlights that some vehicles within the specified model years and platforms have been observed to have oil leaking from the rear axle shafts. Addressing this promptly is important for maintaining vehicle performance and preventing potential damage to axle components.

Symptoms of a Rear Axle Oil Leak

Owners of affected Jeep Wrangler and Gladiator vehicles might notice several signs indicating a Jeep JL JT axle oil leak. The most common symptom is visible oil stains on the ground beneath the rear axle area of the vehicle. You might also observe oil residue directly on the axle housing or surrounding components.

While less common, a significant loss of axle fluid could potentially lead to unusual noises from the rear axle, such as a whining or grinding sound, due to insufficient lubrication. It is crucial to address any suspected rear axle oil leak to prevent further issues.

The Issue Identified by Jeep

Jeep has observed that some JL and JT rear axle shafts are leaking oil. This issue specifically pertains to the seal around the axle shaft, which is designed to prevent lubricant from escaping the axle housing. When this seal fails, it can lead to a gradual loss of axle fluid.

Repair Procedure Summary

To correct the Jeep JL JT axle oil leak, the manufacturer's communication GPOP 9100749 provides clear instructions. Technicians are directed to replace both the axle shaft and the seal as a single unit. This approach ensures that any potential imperfections or wear on either component that might contribute to the leak are simultaneously addressed.

The bulletin explicitly states, "Do not replace seal only." This is a critical instruction, as attempting to replace only the seal without also replacing the axle shaft will not resolve the underlying problem and could lead to a recurrence of the oil leak. After the repair, the original seal and axle shaft are to be kept and sent back to the manufacturer as part of a "fast track" process, likely for analysis.

Affected Part Numbers

The following part numbers are associated with the axle seals and shafts that may be involved in this issue:

• 68393687A$
• 68401306A$
• 68401382A$
• 68401383A$
• 68401892A$
• 68401893A$
• 68471168A$
• 68474094A$
• 68474263A$
• 68474264A$
• 68639186A$
• 68651312A$
• 68651313A$

Important Warnings for Owners

Owners should be aware of the specific repair instruction provided in TSB GPOP 9100749: "Do not replace seal only." This means that if you are experiencing a Jeep JL JT axle oil leak, simply replacing the axle seal will not provide a permanent fix. Insist that your service center follows the manufacturer's recommendation to replace both the axle shaft and the seal together.

What Owners Should Do

If you own a 2023-2026 Jeep Wrangler or Gladiator and suspect a rear axle oil leak, it is recommended to contact your authorized Jeep dealership. Explain the symptoms you are observing and mention Technical Service Bulletin GPOP 9100749. The dealership will be able to diagnose the issue and perform the necessary repair according to the manufacturer's guidelines.

Source: NHTSA ID: 11027741