Replacing the 722.6 Transmission Valve Body and Finishing Demand Video

Dec 23, 2018


Welcome to Grafco Electric, your ultimate resource for all your automotive repair needs. In this comprehensive guide, we will provide you with detailed instructions on how to replace the 722.6 transmission valve body efficiently and effectively. Whether you are a seasoned mechanic or a DIY enthusiast, this step-by-step guide will equip you with the knowledge and skills required for a successful transmission repair.

Understanding the 722.6 Transmission Valve Body

The 722.6 transmission valve body plays a crucial role in shifting gears smoothly in automatic transmissions. It consists of a complex network of valves, solenoids, and springs, all working together to direct hydraulic pressure and control the flow of transmission fluid. Over time, these components can wear out, leading to erratic shifting, harsh engagements, or even complete transmission failure. Replacing the valve body is a common repair procedure to restore the smooth operation of the 722.6 transmission.

Step-by-Step Guide to Replace the 722.6 Transmission Valve Body

Step 1: Prepare for the Repair

Before starting the replacement process, gather all the necessary tools and equipment. These may include:

  • Torque wrench
  • Ratchet set
  • Socket set
  • Oil catch pan
  • New valve body

Ensure the vehicle is safely elevated or positioned on a lift to have easy access to the transmission assembly. It's also recommended to wear appropriate safety gear, such as gloves and eye protection, throughout the repair.

Step 2: Remove the Old Valve Body

Begin by draining the transmission fluid into the oil catch pan. Remember to follow proper disposal guidelines. Once the fluid is drained, locate the transmission valve body, usually positioned on the side of the transmission case. It is typically secured by a series of bolts. Carefully remove each bolt using the appropriate socket and ratchet, then gently detach the valve body from the transmission case, taking note of the position and orientation of any electrical connectors or control modules.

Step 3: Install the New Valve Body

After removing the old valve body, thoroughly clean any residue or debris from the transmission case and mating surfaces. This will ensure the new valve body fits properly and forms a tight seal. Position the new valve body in place, aligning it with the mounting holes, electrical connectors, and control modules. Carefully thread and tighten the mounting bolts, following the torque specifications provided by the manufacturer.

Step 4: Refill with Transmission Fluid

Once the new valve body is securely installed, refill the transmission with the recommended amount and type of transmission fluid. This information can usually be found in the vehicle's owner manual or obtained from the manufacturer. Proper fluid levels are crucial for optimal transmission performance and longevity.

Tips for a Successful Transmission Valve Body Replacement

Tip 1: Diagnostic Testing

Before replacing the valve body, it's important to perform thorough diagnostic testing to confirm that it is indeed the root cause of the transmission issues. Consulting a professional or using specialized diagnostic tools can help identify the specific problem and prevent unnecessary replacements.

Tip 2: Proper Torque Spec

When tightening the mounting bolts, always follow the recommended torque specifications to avoid over or under tightening. This ensures a secure fit without damaging the transmission or causing leaks.

Tip 3: Address Underlying Issues

While replacing the valve body can resolve certain transmission problems, it's essential to address any underlying issues that may have contributed to its failure. Inspecting other components, such as the solenoids, wiring harness, or transmission fluid, can prevent future repairs and optimize overall transmission performance.


In summary, by following this comprehensive guide provided by Grafco Electric, you now have the knowledge and confidence to replace the 722.6 transmission valve body effectively. Remember to gather the necessary tools, carefully remove the old valve body, position and install the new one correctly, and refill the transmission with the recommended fluid. By conducting proper diagnostic testing and following our tips, you will successfully repair your transmission and bring it back to its optimal performance.

Erika Walowski
Great tutorial! 👍
Oct 6, 2023