Changing Valve Body with Transmission in the Car

The valve body is a critical component of an automatic transmission, and when it fails, it can cause a variety of symptoms, including:

• Slipping gears
• Delayed or erratic shifting
• No power in certain gears
• Check engine light

If you are experiencing any of these symptoms, it is important to have your transmission diagnosed by a qualified mechanic. If the valve body is found to be faulty, it will need to be replaced.

Replacing the valve body is a complex and time-consuming procedure, but it is possible to do it yourself with the right tools and knowledge. Here is a step-by-step guide on how to change the valve body with the transmission in the car:

Tools and materials needed:

• New valve body
• Transmission fluid
• Transmission filter
• Gasket set
• Socket wrench set
• Torx wrench set
• Allen wrench set
• Floor jack
• Wheel chocks
• Safety glasses

Safety first!

Before you begin, it is important to take some safety precautions:

• Park the car on a level surface and engage the parking brake.
• Place wheel chocks behind the rear wheels.
• Wear safety glasses to protect your eyes from flying debris.

Step 1: Drain the transmission fluid

Locate the transmission fluid drain plug and place a drain pan underneath it. Open the drain plug and allow the fluid to drain out. Once the fluid has stopped draining, replace the drain plug.

Step 2: Remove the transmission pan

Locate the transmission pan bolts and remove them. Carefully pry the transmission pan off the transmission and allow the remaining fluid to drain out. Clean the transmission pan and the gasket surface on the transmission.

Step 3: Remove the valve body

Locate the valve body bolts and remove them. Carefully lift the valve body off the transmission. Be careful not to damage the gasket or the valve body itself.

Step 4: Install the new valve body

Place the new valve body gasket on the transmission. Carefully lower the new valve body onto the transmission and tighten the bolts.

Step 5: Install the transmission pan

Place a new transmission pan gasket on the transmission. Carefully place the transmission pan on the transmission and tighten the bolts.

Step 6: Refill the transmission fluid

Locate the transmission fluid filler plug and remove it. Insert a funnel into the filler hole and add new transmission fluid until the fluid level reaches the full mark on the dipstick.

Step 7: Start the engine and check for leaks

Start the engine and let it idle for a few minutes. Check for any leaks around the transmission pan or the valve body. If there are no leaks, turn off the engine and allow it to cool down.

Step 8: Road test the car

Once the engine has cooled down, take the car for a road test. Shift through all of the gears and make sure that the transmission is shifting smoothly. If the transmission is shifting properly, you have successfully replaced the valve body.

Congratulations!

You have now successfully replaced the valve body with the transmission in the car. This is a complex and time-consuming procedure, but it is possible to do it yourself with the right tools and knowledge. If you have any questions about this procedure, please consult a qualified mechanic.