1. Introduction
Thank you for purchasing the Yunseity Sequential Shifter Mod. This product is designed to convert your compatible racing shifter into a sequential shifting system, providing a more immersive and realistic experience for racing simulation games. This manual will guide you through the installation, operation, and maintenance of your new shifter mod.
2. Compatibility
This sequential shifter mod is compatible with the following racing shifters:
- Logitech G25
- Logitech G27
- Logitech G29
- Logitech G920
- Logitech G923
- Thrustmaster TH8A
3. Package Contents
Please verify that all the following components are included in your package:

Image 1: All components included in the package.
- Base x 1
- Handbar (Shifter Knob) x 1
- Bearing Kit (Internal Mechanism) x 1
- Spring x 1
- Gasket x 1
- Right-angle wrench x 1
4. Specifications
| Feature | Detail |
|---|---|
| Item Type | Sequential Shifter Mod |
| Material | ABS |
| Application | For Logitech G25, G27, G29, G920, G923 or Thrustmaster TH8A shifters |
| Model Number | Yunseity09nq5wpv4u |
5. Setup & Installation
Follow these steps to install your sequential shifter mod:
- Prepare the Base: Take the main base component. Ensure all mounting points are clear.

Image 2: The base component with visible mounting holes.
- Assemble the Internal Mechanism: Carefully place the bearing kit (internal mechanism) into the designated slot on the base. Ensure it sits securely.

Image 3: The bearing kit being placed into the base.
- Secure the Mechanism: Use the provided right-angle wrench and any necessary fasteners (not explicitly shown but implied by holes) to secure the bearing kit to the base. Ensure it moves freely but is firmly attached.

Image 4: The internal mechanism fully secured to the base.
- Attach the Handbar: Screw or attach the handbar (shifter knob) to the top of the assembled mechanism.

Image 5: Top view of the assembled shifter mod.
- Mount the Mod: Secure the entire sequential shifter mod to your racing rig or desk using appropriate screws or clamps (not included, as this is a mod for existing shifters). The base has pre-drilled holes for mounting.

Image 6: Side view of the assembled shifter mod, showing its profile.
- Connect to your Shifter: Integrate the mod with your compatible Logitech or Thrustmaster shifter according to their respective instructions for sequential mode conversion or attachment.
6. Operating Instructions
Once installed, the Yunseity Sequential Shifter Mod allows for quick and precise gear changes in a sequential pattern. Simply push the handbar forward for an upshift and pull it backward for a downshift. The mod is designed to provide a tactile and responsive feel, mimicking a real sports car's sequential gearbox.
- Upshift: Push the handbar forward.
- Downshift: Pull the handbar backward.
Ensure your racing game or simulation software is configured to recognize sequential shifting inputs from your primary shifter unit (Logitech or Thrustmaster) after the mod is installed.
7. Maintenance
To ensure the longevity and optimal performance of your sequential shifter mod, follow these simple maintenance guidelines:
- Cleaning: Wipe the surfaces with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Inspection: Periodically check all screws and connections to ensure they are tight. Re-tighten if necessary using the provided wrench.
- Storage: When not in use for extended periods, store the mod in a clean, dry environment away from direct sunlight and extreme temperatures.
8. Troubleshooting
If you encounter any issues with your sequential shifter mod, consider the following common solutions:
- Shifting feels loose or unresponsive: Check all connections and ensure the bearing kit is securely fastened to the base. Verify the spring is correctly seated.
- Mod does not register inputs: Ensure the mod is correctly integrated with your primary shifter (Logitech/Thrustmaster) and that your game settings are configured for sequential shifting.
- Unusual noises during shifting: Inspect the internal mechanism for any obstructions or loose parts. Ensure the gasket is properly placed.
If problems persist, please contact customer support.
9. Support
For further assistance, technical support, or warranty inquiries, please contact your retailer or the manufacturer directly. Please have your product model number (Yunseity09nq5wpv4u) and purchase information ready when contacting support.