1. Introducció
This manual provides instructions for the assembly and installation of the Traxxas 1651 Half-Shafts with Metal U-Joints. This kit is designed as a replacement or upgrade part for compatible Traxxas Remote Control (RC) vehicles, ensuring reliable power transmission to the wheels. It includes two internal-splined half-shafts, two external-splined half-shafts, and four metal U-joints.
Please read these instructions carefully before proceeding with assembly and installation to ensure proper function and longevity of the components.
2. Configuració i instal·lació
The Traxxas 1651 kit requires assembly of the U-joints with the half-shafts before installation into your RC vehicle. It is recommended to consult your specific vehicle's user manual for detailed instructions on removing existing half-shafts and installing new ones.
2.1 Contingut del kit
- 2 x Internal-Splined Half-Shafts
- 2 x External-Splined Half-Shafts
- 4 x Metal U-Joints
2.2 Assembly of Half-Shafts and U-Joints
The metal U-joints must be snapped into the plastic half-shaft components. This process may require careful handling and a small amount of force.
- Identify the plastic housing on the half-shafts where the metal U-joint will connect.
- Carefully align one end of a metal U-joint with the opening in the plastic housing.
- Using needle-nose pliers or a similar small tool, gently pry apart the plastic tabs of the housing just enough to allow the ball pin of the U-joint to enter.
- Slowly push the ball pin into the housing until it snaps securely into place. Avoid excessive force to prevent damage to the plastic components.
- Repeat this process for all four U-joints, connecting them to the appropriate half-shaft ends. Ensure all connections are secure before proceeding.
Nota: The plastic components are designed to be durable but can be damaged if undue force is applied. If you encounter difficulty, try applying pressure slowly and evenly. Some users find it helpful to slightly bend the plastic outwards with pliers to facilitate insertion.
2.3 Installation into Vehicle
Once the half-shafts are assembled with the U-joints, they are ready for installation into your Traxxas RC vehicle. Refer to your vehicle's specific instruction manual for the correct procedure to replace the drive shafts. Typically, this involves:
- Removing the wheels and any components obstructing access to the existing half-shafts.
- Carefully detaching the old half-shafts from the differential and wheel hub.
- Installing the new Traxxas 1651 half-shaft assemblies, ensuring they are properly seated and secured.
- Reassembling any removed components and wheels.

Figure 1: Components of the Traxxas 1651 Half-Shafts and Metal U-Joints kit. This image displays the internal-splined and external-splined half-shafts, along with the metal U-joints, ready for assembly and installation into a compatible Traxxas RC vehicle.
3. Funcionament
The Traxxas 1651 Half-Shafts and Metal U-Joints function as critical components of your RC vehicle's drivetrain. Once correctly installed, they transmit power from the differential to the wheels, allowing for vehicle movement and steering. These parts are designed for durability and efficient power transfer under various operating conditions typical for RC vehicles.
No specific operational steps are required for the half-shafts themselves beyond ensuring they are properly installed and free from obstruction. Regular inspection is recommended to ensure continued smooth operation.
4. Manteniment
Proper maintenance extends the lifespan of your Traxxas 1651 Half-Shafts and Metal U-Joints. Follow these general guidelines:
- Inspecció periòdica: Periodically inspect the half-shafts and U-joints for signs of wear, cracks, or damage, especially after heavy use or impacts. Check for any looseness in the connections.
- Neteja: Keep the components free from dirt, debris, and excessive grease. Use a soft brush or compressed air to clean the shafts and joints. Avoid harsh chemicals that could degrade the plastic.
- Lubricació: While the U-joints are metal, they typically do not require external lubrication in this application. If operating in extremely dusty or wet conditions, consult your vehicle's manual for specific lubrication recommendations for drivetrain components.
- Substitució: If any part of the half-shaft assembly shows significant wear or damage, replace it promptly to prevent further damage to other drivetrain components.
5. Solució De Problemes
This section addresses common issues that may arise with the Traxxas 1651 Half-Shafts and Metal U-Joints.
- Difficulty during U-Joint Assembly: If the metal U-joints are difficult to snap into the plastic half-shafts, ensure proper alignment. Gently prying the plastic tabs with needle-nose pliers can help. Do not force the components, as this may cause breakage.
- Half-Shaft Disconnection during Operation: Ensure that the half-shafts are fully seated and secured within the differential and wheel hub connections. Verify that all clips or pins (if applicable to your vehicle model) are correctly installed.
- Soroll o vibració inusual: Inspect the half-shafts and U-joints for any signs of damage, excessive wear, or foreign objects. Ensure all components are clean and properly aligned. Check for bent shafts or damaged U-joint pins.
- Reduced Power to Wheels: This could indicate a damaged or disconnected half-shaft. Inspect the entire drivetrain for any broken or dislodged components.
If issues persist after troubleshooting, consult your Traxxas vehicle's manual or contact Traxxas customer support for further assistance.
6. Especificacions
| Número de model | TRA1651 |
| Fabricant | Traxxas |
| Dimensions del producte | 3.13 x 0.5 x 5 polzades (7.95 x 1.27 x 12.7 cm) |
| Pes de l'article | 0.32 unces (9.07 grams) |
| Continguts | 2 Internal-Splined Half-Shafts, 2 External-Splined Half-Shafts, 4 Metal U-Joints |
| Material | Plastic half-shafts, Metal U-joints |
| Edat recomanada | 15 anys i més |
7. Garantia i assistència
Informació de la garantia: Specific warranty details for the Traxxas 1651 Half-Shafts and Metal U-Joints are typically provided with the original product packaging or can be found on the official Traxxas website. Please refer to these resources for the most current warranty policy.
Atenció al client: For technical assistance, replacement parts, or further inquiries, please contact Traxxas customer support directly. Visit the official Traxxas weblloc web amb informació de contacte i recursos de suport.
Official Traxxas Weblloc: https://traxxas.com





