2022-2026 Jeep Wrangler/Gladiator Pinion Seal Leak TSB
A suspected leak on the front or rear axle pinion seal in 2022-2026 Jeep Wrangler and Gladiator models is addressed by TSB S2603000001. This bulletin helps distinguish between normal grease migration and an actual oil leak.
Also applies to
- Jeep Gladiator
- 2022–2026
- Jeep Wrangler
- 2022, 2023, 2024, 2026
Owners of 2022-2026 Jeep Wrangler (JL) and 2022-2026 Jeep Gladiator (JT) vehicles may notice what appears to be a leak on their front or rear axle pinion seal. This issue is addressed in STAR Online Publication Case Number S2603000001, which clarifies that not all visible wetness indicates a problem. This bulletin provides a diagnostic procedure to help technicians differentiate between normal grease migration and an actual axle oil leak, specifically for a suspected Jeep Wrangler pinion seal leak or Gladiator pinion seal leak.
Symptoms of a Suspected Pinion Seal Leak
The primary symptom an owner might observe is a suspected leak or
Gallery
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Frequently Asked Questions
- What does a suspected leak on the front or rear axle pinion seal mean for my Jeep?
- A suspected leak on your 2022-2026 Jeep Wrangler or Gladiator's axle pinion seal might not be an actual problem. The pinion seal is assembled with grease that can migrate outward, appearing as 'wetness' but not indicating a failure, as explained in TSB S2603000001.
- How can technicians tell if it's a real oil leak or just grease?
- Technicians follow a specific diagnostic procedure. After cleaning the area, if the source of the 'wetness' is unclear, they may add UV dye to the axle housing. Under UV light, axle oil with dye will appear fluorescent/yellow-green, while normal grease will show as a blue dull residue that does not fluoresce brightly.
- Will a suspected pinion seal leak be covered under warranty?
- The STAR Online Publication Case Number S2603000001 explicitly states that it 'does not authorize warranty repairs.' It serves as a communication documenting past experiences and diagnostic steps. The decision on appropriate action, including warranty coverage, is at the discretion of the expert technician.
- What happens if an actual axle oil leak is confirmed?
- If the diagnostic steps confirm an actual axle oil leak using UV dye, technicians will then follow the repair procedure outlined in the Service Library under '03 - Differential/Driveline, Seals, Front/Rear Axle.' A test drive of at least 20 miles is required after the repair to ensure the leak is corrected.
What Jeep Wrangler owners report
Counted from the records in our database across 41 model years.
- 18,838
- Owner complaints
- 104
- Recalls
- 2,758
- Service bulletins
- 572
- Crashes reported
- 552
- Fires reported
- 435
- Injuries reported
The 2025 model year
82 complaints, the 32nd most of 41 model years on file. Owners reported 5 crashes, 2 fires and 1 injury for this year, which also has 6 recalls on file.
Power Train, the system this article covers, accounts for 2,470 of 18,838 complaints (13%), including 14 for 2025.
Complaints by model year
| 2006 | 730 | |
|---|---|---|
| 2007 | 1,750 | |
| 2008 | 1,904 | |
| 2010 | 686 | |
| 2012 | 836 | |
| 2018 | 1,827 | |
| 2019 | 747 | |
| 2021 | 963 | |
| 2024 | 970 | |
| 2025 | 82 |
Most-reported systems
- Steering — 3,929
- Electrical System — 3,613
- Power Train — 2,470
- Engine — 2,406
- Fuel System — 2,015
Latest recalls for the 2025 model year
- 26V363000 — Steering (Jun 2026) — Park outside
- 26V327000 — Back Over Prevention (May 2026)
- 25V766000 — Engine (Nov 2025)
Recent owner reports about power train
The 12-volt auxiliary battery and related electrical system in my 2025 Jeep Wrangler 4XE plug-in hybrid (leased new 8/25/2025) repeatedly fail.
Read owner complaints →Component/System Failure: The hybrid/electric propulsion system intermittently loses power while driving. Electric output is progressively reduced to approximately 50%, then 25%, and then fully disabled, even when sufficient battery charge remains.
Complaints are owner reports filed with NHTSA. They are unverified, and counts depend on how many vehicles were sold, so they are not a failure rate.
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