1. Product Overview
The Dorman 946-350 Rear Drive Shaft is a direct replacement component designed for specific Ford F-250 and F-350 Super Duty models. This assembly is engineered to match original equipment dimensions, ensuring dependable fit and performance. It is supplied as a complete, pre-balanced unit, ready for installation, and features 100% new yokes, tubes, constant velocity (CV) joints, and universal joints.
This drive shaft is designed for future serviceability, featuring non-staked universal joints.
Image 1: Complete Dorman 946-350 Rear Drive Shaft Assembly.
2. Vehicle Compatibility
This Dorman 946-350 Rear Drive Shaft is compatible with the following vehicle models:
- Ford F-250 Super Duty: 2002, 2003
- Ford F-350 Super Duty: 2002, 2003
To confirm exact fitment for your vehicle, it is recommended to verify compatibility using your vehicle's make, model, and trim level.
3. What's in the Box
The package for the Dorman 946-350 Rear Drive Shaft includes:
- 1 x Dorman 946-350 Rear Drive Shaft Assembly
4. Installation Instructions
The Dorman 946-350 Rear Drive Shaft is designed for direct replacement and comes pre-balanced for straightforward installation. Professional installation is recommended for optimal safety and performance.
4.1. Pre-Installation Checks
- Ensure the vehicle is safely supported on a lift or jack stands.
- Confirm the new drive shaft matches the dimensions and specifications of the original part.
- Gather all necessary tools for removal and installation.
4.2. Removal of Old Drive Shaft
- Mark the orientation of the old drive shaft relative to the differential flange and transmission output shaft to aid in correct installation of the new unit.
- Remove the bolts securing the drive shaft to the differential flange.
- Carefully slide the drive shaft out of the transmission output shaft. Be prepared for some transmission fluid to drip.
- Remove any center support bearings or hangers if applicable.
4.3. Installation of New Drive Shaft
- Apply a thin layer of grease to the splines of the new drive shaft.
- Carefully insert the front end of the drive shaft into the transmission output shaft, ensuring proper alignment.
- Align the rear flange of the drive shaft with the differential flange, matching any marks made during removal.
- Install and tighten the bolts securing the drive shaft to the differential flange to the manufacturer's specified torque.
- If applicable, install the center support bearing and secure it.
- Verify all connections are secure and properly torqued.
Image 2: Disassembled view highlighting the spline and universal joint components.
Image 3: Assembled view of the drive shaft, showing the connection points.
5. Operation and Post-Installation Check
Once installed, the drive shaft operates as a critical component of your vehicle's drivetrain, transmitting power from the transmission to the differential. Proper installation ensures smooth and efficient power transfer.
5.1. Post-Installation Check
- After installation, lower the vehicle and perform a short test drive in a safe area.
- Listen for any unusual noises, vibrations, or clunking sounds.
- Check for any leaks around the transmission output shaft seal.
- If any issues are detected, immediately stop driving and re-inspect the installation.
6. Maintenance
The Dorman 946-350 Rear Drive Shaft features serviceable universal joints, which allows for future maintenance and replacement of these components if needed. Regular inspection of the drive shaft and its components is recommended as part of your vehicle's routine maintenance schedule.
- Visual Inspection: Periodically check the drive shaft for signs of damage, dents, rust, or excessive wear on the universal joints and center support bearing (if applicable).
- Lubrication: If your vehicle's maintenance schedule specifies lubrication for drive shaft components, follow those guidelines. The serviceable universal joints may require periodic greasing.
Image 4: Close-up view of a universal joint on the drive shaft.
Image 5: Close-up view of the drive shaft flange.
7. Troubleshooting
If you experience issues after installing the Dorman 946-350 Rear Drive Shaft, consider the following common problems and solutions:
| Symptom | Possible Cause | Solution |
|---|---|---|
| Vibration during acceleration or at certain speeds |
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| Clunking or banging noise when shifting gears or accelerating |
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| Squeaking or chirping noise |
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If troubleshooting steps do not resolve the issue, it is recommended to consult a qualified automotive technician.
8. Specifications
| Specification | Detail |
|---|---|
| Brand | Dorman |
| Model Number | 946-350 |
| Item Weight | 55 pounds |
| Product Dimensions | 63.5 x 15 x 6.5 inches |
| Manufacturer Part Number | 946-350 |
| OEM Part Number | 2C3Z4R602DL |
| Hollander Number | 431-05123 |
| Construction | 100% new yokes, tubes, CV joints, and universal joints |
| Universal Joints | Non-staked, serviceable |
| Balance | Pre-balanced |
9. Warranty and Support
Dorman products are designed for quality and reliability. For specific warranty information, please refer to the documentation provided with your purchase or visit the official Dorman website.
9.1. Returns
This product is eligible for 30-day easy returns. Please refer to your retailer's return policy for detailed instructions.
9.2. Customer Support
For technical assistance, product inquiries, or support, please contact Dorman customer service. Contact information can typically be found on the Dorman website or product packaging.
You can also visit the Dorman Store on Amazon for more information and products.
