1. Introduction
This instruction manual provides essential information for the proper installation, operation, and maintenance of your Traxxas 7078 Complete Differential Assembly. Designed for 1/16 scale Traxxas vehicles, this assembly ensures reliable power transfer and performance. Please read this manual thoroughly before installation and use to ensure optimal performance and longevity of your product.
2. Safety Information
Always exercise caution when working with mechanical components. Keep small parts away from children. Wear appropriate safety gear, such as eye protection, during installation or maintenance. Refer to your vehicle's user manual for additional safety guidelines specific to your model.
Warning: This product contains small parts and is not suitable for children under 3 years old due to choking hazards. Recommended age for use is 14 years and older.
3. Product Overview
The Traxxas 7078 is a complete, pre-assembled differential unit designed for direct replacement or upgrade in 1/16 scale Traxxas vehicles. It is fully sealed and pre-filled with differential oil, ensuring consistent performance and minimal maintenance upon initial installation.
Figure 3.1: Traxxas 7078 Complete Differential Assembly. This image shows the fully assembled differential unit with its main gear and output shafts.
Key Features:
- Complete, Assembled Differential: Ready for immediate installation.
- Fully Sealed and Filled: Pre-filled with differential oil for optimal performance and protection.
- Easy Drop-in Replacement: Designed for straightforward installation into compatible Traxxas 1/16 vehicles.
4. Setup & Installation
This section outlines the general steps for installing the Traxxas 7078 differential assembly. Always refer to your specific vehicle's owner's manual for detailed disassembly and reassembly instructions, as procedures may vary slightly between models.
- Prepare the Vehicle: Ensure the vehicle is powered off and the battery is disconnected. Place the vehicle on a stable, clean surface.
- Access the Differential Housing: Carefully disassemble the relevant section of your vehicle (e.g., transmission case, chassis components) to gain access to the existing differential housing. This typically involves removing screws and possibly other drivetrain components.
- Remove Old Differential: Once the housing is accessible, remove the old differential assembly. Note the orientation and any shims or bearings for proper reinstallation.
- Inspect Bearings and Seals: Before installing the new differential, inspect the bearings and seals within the differential housing. Replace any worn or damaged components.
- Install New Differential: Carefully place the new Traxxas 7078 differential assembly into the housing. Ensure it seats correctly and that any associated bearings or shims are properly positioned.
- Reassemble Vehicle: Reassemble the vehicle components in reverse order of disassembly. Ensure all screws are tightened to the manufacturer's specifications. Do not overtighten.
- Function Test: After reassembly, manually rotate the wheels to ensure smooth operation of the drivetrain. Perform a low-speed test run to confirm proper function before full operation.
5. Operation
The Traxxas 7078 differential assembly is designed to distribute power efficiently to the drive wheels, allowing them to rotate at different speeds during turns. This is crucial for smooth handling and preventing tire scrub. Once installed, the differential operates automatically as part of your vehicle's drivetrain. No specific user interaction is required for its operation beyond normal vehicle use.
6. Maintenance
While the Traxxas 7078 differential is a sealed unit, periodic inspection and maintenance of surrounding components are recommended to ensure its longevity and optimal performance.
- Regular Inspection: Periodically inspect the differential housing and surrounding drivetrain components for signs of wear, damage, or debris accumulation.
- Bearing Check: Check the bearings that support the differential for smooth rotation and excessive play. Replace worn bearings as necessary.
- Cleanliness: Keep the differential area clean from dirt, dust, and foreign objects that could interfere with its operation or damage seals.
- Fluid Check (Advanced): Although sealed, if you suspect a leak or wish to change the differential fluid for tuning purposes, consult your vehicle's manual for the correct fluid type and procedure. This typically involves disassembling the differential case.
- Gear Mesh: Ensure proper gear mesh with the pinion gear. Incorrect mesh can lead to premature wear or damage.
7. Troubleshooting
This section addresses common issues you might encounter with your differential assembly.
| Problem | Possible Cause | Solution |
|---|---|---|
| Vehicle not moving or only one wheel spinning (rear differential) | Damaged or stripped internal differential gears. | Inspect the differential. If gears are stripped, the differential assembly may need replacement. |
| Unusual noise from differential area | Worn bearings, improper gear mesh, or damaged internal components. | Disassemble and inspect bearings, gears, and fluid levels. Adjust gear mesh if necessary. Replace worn parts. |
| Differential feels stiff or binds | Contamination, incorrect assembly, or damaged bearings. | Disassemble, clean, and reassemble carefully. Check for proper bearing installation and ensure no debris is present. |
| Fluid leakage from differential housing | Damaged seals or housing. | Inspect seals and housing for cracks or damage. Replace affected components. |
If you are unable to resolve an issue, contact Traxxas customer support or consult a qualified RC technician.
8. Specifications
- Model Number: TRAC7078
- Part Type: Complete Differential Assembly
- Compatibility: Traxxas 1/16 Scale Vehicles
- Product Dimensions: 5 x 3.13 x 0.5 inches
- Item Weight: 0.81 ounces
- Manufacturer: Traxxas
- Recommended Age: 14 - 15 years (for vehicle operation, not part handling)
- Condition: Pre-assembled, sealed, and oil-filled
9. Warranty Information
Traxxas products are manufactured to high standards. For specific warranty details regarding the Traxxas 7078 Complete Differential Assembly, please refer to the warranty information provided with your original Traxxas vehicle or visit the official Traxxas website. Warranty terms typically cover manufacturing defects and may vary by region.
10. Customer Support
If you have any questions, require technical assistance, or need to order replacement parts, please contact Traxxas customer support:
- Website: traxxas.com/support
- Phone: Refer to the Traxxas website for regional contact numbers.
- Email: Refer to the Traxxas website for contact forms or email addresses.
When contacting support, please have your product model number (TRAC7078) and vehicle information ready.
