2021-2025 Jeep Wrangler & Gladiator Steering Shimmy TSB 9100491

Owners of 2021-2025 Jeep Wrangler and Gladiator models experiencing a Jeep steering shimmy should be aware of manufacturer communication TSB 9100491. This bulletin, issued on January 17, 2025, provides crucial guidance for technicians on diagnosing steering shimmy and related concerns, aiming to ensure proper repairs and prevent unnecessary component replacements.

Symptoms

The primary symptom addressed by TSB 9100491 is a "Steering Shimmy." This typically manifests as a noticeable vibration or oscillation in the steering wheel, often felt at certain speeds or under specific driving conditions. Another related concern is "Ball Joint Looseness," which can contribute to the shimmy.

Diagnosis and Trigger Conditions

For accurate diagnosis of a Jeep steering shimmy, technicians are instructed to reference specific procedures within the service library. The bulletin highlights two key references:

• S1819000004 Rev. Q: This document provides comprehensive information for steering shimmy diagnosis.
• 19 - Steering / Diagnosis and Testing (IN SERVICE LIBRARY): This section covers general steering system diagnostics.
• 19 - Steering / Linkage / END, Tie Rod / Diagnosis and Testing: This procedure is specifically for addressing concerns related to ball joint looseness.

These references guide technicians through a thorough inspection process to identify the root cause of the steering shimmy, focusing on the steering linkage, tie rods, and ball joints.

Important Warnings for Diagnosis and Repair

TSB 9100491 includes a critical directive for technicians regarding component replacement:

"DO NOT REPLACE DRAG LINK AND TIE ROD UNLESS PART HAS VISIABLE DAMAGE OR FREE PLAY EXCEEDS SPECS."

This warning emphasizes the importance of proper diagnosis. Technicians should not replace the drag link or tie rod simply because a steering shimmy is present. Replacement should only occur if the components show clear visible damage or if their free play exceeds the manufacturer's specifications. This helps prevent unnecessary repairs and costs.

Required Tools or Parts

While the bulletin primarily focuses on diagnostic procedures, it mentions a specific part related to the steering system: the "Drag Link Long Socket." The associated part numbers are 68258760A$, 68522992A$, and 68522995A$. These parts may be relevant for proper inspection or repair if a component is indeed found to be faulty.

Owner Action

If you own a 2021-2025 Jeep Wrangler or Gladiator and are experiencing a Jeep steering shimmy or suspect ball joint looseness, it is recommended to schedule an appointment with an authorized Jeep dealership. Inform them about the symptoms you are experiencing and mention manufacturer communication TSB 9100491. This will ensure that their technicians follow the prescribed diagnostic procedures to accurately identify and address the issue.

NHTSA ID: 11012925