123 107 126 201 124 722.3x and 722.4x Transmission Modulator Valve Installation

Jul 13, 2022


Welcome to Grafco Electric, your trusted source for high-quality automotive parts and solutions. In this guide, we will provide you with detailed instructions on how to install the 123 107 126 201 124 722.3x and 722.4x transmission modulator valve. This essential component plays a crucial role in ensuring optimal transmission performance and efficiency.

Why Choose Grafco Electric?

At Grafco Electric, we pride ourselves on offering top-of-the-line automotive products that exceed industry standards. Our transmission modulator valves are crafted with precision and built to last, delivering unmatched reliability and performance. Count on us for exceptional customer service and technical support.

Tools and Materials

  • Socket wrench set
  • Screwdrivers
  • Torque wrench
  • Transmission modulator valve
  • New transmission fluid
  • Shop towels

Installation Steps

Step 1: Safety First

Ensure that your vehicle is parked on a flat surface and the engine is turned off. Put on safety goggles and gloves to protect yourself during the installation process.

Step 2: Locate the Modulator Valve

The transmission modulator valve is typically located on the side of the transmission case. Consult your vehicle's manual or online resources for the exact location.

Step 3: Remove the Old Valve

Use a socket wrench or the appropriate tool to carefully loosen and remove the bolts securing the old modulator valve. Take note of the orientation of the valve and any hoses attached to it.

Step 4: Install the New Valve

Before installing the new modulator valve, make sure it is compatible with your vehicle's transmission model. Attach any hoses as per the previous configuration, and securely tighten the bolts using a torque wrench.

Step 5: Refill Transmission Fluid

Locate the transmission fluid dipstick, usually near the engine. Remove it and use a funnel to add the recommended amount of new transmission fluid. Check the fluid level using the dipstick, ensuring it is within the appropriate range.

Step 6: Test and Inspect

Start the engine and let it run for a few minutes to warm up. Shift through the gears and ensure smooth transitions. Check for any leaks or abnormal sounds. If everything looks and feels normal, you have successfully installed the transmission modulator valve.


By following these step-by-step instructions, you can confidently install the 123 107 126 201 124 722.3x and 722.4x transmission modulator valve. Remember, proper installation is essential for maintaining the efficiency and longevity of your vehicle's transmission. Trust Grafco Electric for all your automotive needs, and enjoy the peace of mind that comes with high-quality products.

Adam Balhouse
Great guide, very useful! 👍
Nov 8, 2023