2022-2026 Jeep Wrangler/Gladiator Pinion Seal Leak TSB

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.