1. Introduction
This manual provides detailed instructions for the assembly, operation, and maintenance of your wishiot MOC Rear Drive System. This technical building block set is designed to create a functional car chassis with advanced features like shock absorption and differentials, enhancing the realism and playability of your MOC vehicle creations. Please read this manual thoroughly before beginning assembly to ensure correct construction and optimal performance.
2. Safety Information
⚠ WARNING: This product contains small parts and is not suitable for children under 3 years old due to choking hazards. Adult supervision is recommended during assembly and play. This product can expose you to chemicals including phthalates (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
3. Product Overview
The wishiot MOC Rear Drive System is a sophisticated building block set designed for enthusiasts of technical models. It features a robust grey chassis, integrated shock absorbers for realistic suspension, and functional differentials for improved traction and cornering. This system is compatible with MOC Power Functions, allowing for integration into various custom vehicle designs.

Figure 3.1: Assembled MOC Rear Drive System (front view)
4. Specifications
| Attribute | Value |
|---|---|
| Brand | wishiot |
| Model Number | T1156, T1155 |
| Material | Plastic (ABS) |
| Plastic Block Shape | Self-locking bricks |
| Block Size | Micro block, large building block (>1cm) |
| Gender | Unisex |
| Electrical | No battery required |
| Highly Concerned Chemical Product | None (as per product attributes) |
| Recommended Age | 14+, 18+ |
| Compatibility | For MOC Power Functions |
| Product Weight | 0.16 kg |
| Package Dimensions | 20cm (L) x 10cm (W) x 10cm (H) |
5. Package Contents
Your wishiot MOC Rear Drive System package will contain loose building block parts that require assembly. Please verify all components upon receipt.
- Package 1: 1 Set of Rear Drive System Bricks + Shock Absorber Wheels
- Package 2: 1 Set of Rear Drive System Shock Absorber Bricks (without wheels)
The specific components will vary slightly depending on whether you selected the option with or without wheels. Both packages include the necessary bricks for the chassis, shock absorbers, and differential mechanism.

Figure 5.1: Example of parts included (with wheels option)

Figure 5.2: Example of parts included (without wheels option)
6. Assembly Instructions
The MOC Rear Drive System is provided as loose parts for you to assemble. While specific step-by-step diagrams are not included in this manual, the assembly process generally involves connecting the various technical bricks, pins, gears, and shock absorber components to form the functional rear drive chassis. Refer to the product images and the assembly video for visual guidance.
General Assembly Steps:
- Sort Parts: Begin by sorting the various bricks, pins, gears, and shock absorber elements. This will help you identify components quickly during assembly.
- Build the Main Chassis Frame: Construct the primary frame of the rear drive system using the longer beam elements and connecting pins.
- Integrate Differentials: Assemble the differential gears and housing, then integrate them into the central part of the chassis frame. Ensure gears mesh smoothly.
- Attach Shock Absorbers: Connect the shock absorber components (springs and yellow cylinders) to the chassis frame, ensuring they are securely fastened and allow for vertical movement.
- Install Axles and Connectors: Insert the axles and other connecting elements that will transmit power from the differential to the wheels (if included).
- Final Checks: Once assembled, gently test the movement of the system. The shock absorbers should compress and extend smoothly, and the differential gears should rotate freely.
Video 6.1: Assembly and Disassembly Demonstration of the MOC Rear Drive System. This video provides a visual guide to the construction process.

Figure 6.2: Top view of the assembled system, showing gear placement.

Figure 6.3: Bottom view of the assembled system, highlighting structural connections.
7. Operating Instructions
Once fully assembled, the MOC Rear Drive System is ready to be integrated into your custom vehicle. This system provides:
- Rear Wheel Drive: Designed to transmit power to the rear wheels of your MOC vehicle.
- Shock Absorption: The integrated shock absorbers provide suspension, allowing the vehicle to handle uneven surfaces and absorb impacts.
- Differentials: The differential mechanism allows the wheels to rotate at different speeds, which is crucial for smooth turning and improved traction.
Connect the input shaft of the differential to your chosen power source (e.g., MOC Power Functions motor) to drive the system. Ensure all connections are secure for optimal performance.
8. Maintenance
To ensure the longevity and smooth operation of your MOC Rear Drive System, follow these simple maintenance guidelines:
- Cleaning: Regularly clean the blocks with a soft, dry cloth to remove dust and debris. For stubborn dirt, use a slightly damp cloth and mild soap, then dry thoroughly.
- Inspection: Periodically check all connections and moving parts (gears, shock absorbers) for any signs of wear or damage. Ensure pins are securely seated.
- Storage: Store the assembled system or loose parts in a cool, dry place away from direct sunlight to prevent material degradation.
9. Troubleshooting
If you encounter issues with your MOC Rear Drive System, consider the following:
- Parts not fitting: Ensure you are using the correct parts as indicated by the visual guides. Sometimes similar-looking parts have subtle differences. Apply gentle, even pressure when connecting.
- System not moving smoothly: Check all gear connections to ensure they are properly meshed and not obstructed. Verify that the axles are correctly aligned and not bent. Ensure shock absorbers are not jammed.
- Missing parts: Double-check the packaging. If parts are genuinely missing, contact customer support with your order details.
10. User Tips
Here are some tips to enhance your experience with the MOC Rear Drive System:
- Pre-sort parts: Before starting assembly, sort all the pieces by type and color. This significantly speeds up the building process.
- Test functionality during assembly: As you build, periodically test the movement of gears and suspension components to catch any errors early.
- Experiment with designs: This system is designed for MOC (My Own Creation) projects. Feel free to experiment with different vehicle designs and integrations to maximize its potential.
11. Warranty and Support
For any questions, concerns, or support regarding your wishiot MOC Rear Drive System, please contact the seller directly through the platform where you made your purchase. Provide your order number and a clear description of the issue for prompt assistance.