Dorman 74040 Automatic Shifter Bushing: Installation and Maintenance Manual

1. Product Overview

The Dorman 74040 Automatic Shifter Bushing is engineered as a direct replacement component for the automatic transmission shift lever control rod. It is designed to match the function and performance of the original equipment bushings on specified vehicles, restoring proper shifter feel and operation.

• Material: Durable Nylon and Plastic construction.
• Color: Beige.
• Dimensions: Outer Diameter (O.D.) 0.525 In.; Inner Diameter (I.D.) 0.240 In.; Length 0.490 In.
• Quantity: One (1) bushing per package.

Figure 1: Side view of the Dorman 74040 Automatic Shifter Bushing, showing its cylindrical shape and beige color.

Figure 2: Top-down view of the Dorman 74040 Automatic Shifter Bushing, illustrating the inner diameter.

2. Compatibility

This bushing is compatible with select Ford, Lincoln, and Mercury models. It is crucial to verify the exact fitment for your specific vehicle's year, make, and model before installation. Consult your vehicle's service manual or a reputable automotive parts database to confirm compatibility.

3. Specifications

4. Installation Instructions

Replacing an automatic shifter bushing requires careful attention to detail. If you are not comfortable performing this procedure, it is recommended to seek assistance from a qualified automotive technician.

Required Tools and Materials:

• New Dorman 74040 Automatic Shifter Bushing
• Basic hand tools (wrenches, pliers, possibly a C-clamp)
• Heat-resistant container for hot water
• Thermometer (optional, for water temperature)
• Medium strength thread locker (optional, for securing linkage nut)
• 13mm socket with extension (if adjusting linkage nut)

Procedure:

1. Prepare the Vehicle: Safely lift and support the vehicle to access the transmission linkage. Ensure the vehicle is in park and the parking brake is engaged.
2. Locate the Old Bushing: Identify the worn or broken bushing on the automatic transmission shift lever control rod.
3. Remove the Old Bushing: Carefully remove any remaining pieces of the old bushing. Clean the linkage nipple/bolt and shaft thoroughly.
4. Soften the New Bushing: To facilitate easier installation, heat water to approximately 180°F (82°C). Place the new Dorman 74040 bushing into the hot water and let it soak for 20 to 30 minutes. This will make the plastic slightly pliable. Allow it to cool slightly to a safe handling temperature.
5. Install the New Bushing: While the bushing is still warm and pliable, connect it by hand onto the linkage nipple/bolt. Then, connect it to the linkage shaft. This may require some effort, but typically no specialized tools are needed to snap it into place if properly softened. If necessary, a C-clamp or pliers can be used carefully to press it into position, ensuring not to damage the bushing.
6. Test and Adjust Shifting: If applicable, re-attach any nuts or fasteners. Tighten by hand initially. From inside the vehicle, test the shifter through all gear positions (Park, Reverse, Neutral, Drive, Low). The shifting should feel smooth and precise, without excessive looseness.
7. Secure the Linkage (Optional but Recommended): Once smooth shifting is achieved and the linkage is not too loose, apply a medium-strength thread locker liquid to the nut and bolt. This helps secure the connection against vibration while still allowing for future removal with hand tools.
8. Final Check: Lower the vehicle and perform a final check of all connections and shifter operation before driving.

5. Operating Considerations

Once correctly installed, the Dorman 74040 Automatic Shifter Bushing ensures the proper connection between the shift lever and the transmission. This results in accurate and consistent gear selection. If, after installation, the shifter feels loose, imprecise, or difficult to move, refer to the troubleshooting section.

6. Maintenance

The Dorman 74040 bushing is designed for durability. However, like all automotive components, it is subject to wear over time. Regular inspection of the transmission linkage, including the bushing, is recommended during routine vehicle maintenance. Check for signs of cracking, excessive play, or deterioration. Promptly replace any worn or damaged bushings to maintain optimal shifter function and prevent potential issues.

7. Troubleshooting

• Bushing does not fit:
  • Verify the part compatibility with your specific vehicle's make, model, and year.
  • Ensure the bushing was adequately softened by soaking in hot water as described in the installation steps.
• Shifter still feels loose after installation:
  • Re-check the installation to ensure the bushing is fully seated on both the linkage nipple/bolt and the shaft.
  • Confirm that all associated linkage components are securely fastened and free from excessive wear.
• Difficulty installing the bushing:
  • Ensure the bushing has been soaked in hot water for the recommended duration to maximize pliability.
  • Apply a small amount of silicone grease or dish soap to the inside of the bushing for lubrication, if needed.
  • Use appropriate tools like pliers or a C-clamp carefully to press the bushing into place, taking care not to damage the component.

8. Warranty and Support

The Dorman 74040 Automatic Shifter Bushing is backed by a Limited Lifetime Warranty. For specific warranty details, claims, or technical assistance, please contact Dorman Products customer service directly or visit their official website.

For further assistance, you may visit the Dorman Store on Amazon.