Tundra Transmission Solenoid Problems and Fixes

A Toyota Tundra transmission solenoid is a tiny valve that controls the flow of transmission fluid to various transmission components.

There are several separate solenoids, each of which is responsible for managing an individual function.

Among all solenoids, the most basic are Shift solenoids, Pressure control solenoids, Lockup solenoids, Coolant solenoids, etc.

Sometimes, transmission solenoids malfunction for certain reasons and fail to work properly.

Today I will discuss the possible problems with this small part of the transmission, their causes, symptoms, and solutions in detail.

Toyota Tundra Transmission Solenoid Problems [4 Problems and Solutions]

There are 4 main problems with the Toyota Tundra transmission solenoids: delayed or irregular gear shifting; transmission ‘Hunt’ for gears; transmission slips or vibrates; and Limp Mode issues.

4 Toyota Tundra Solenoid Problems

There are basically 4 problems you will see with Toyota Tundra Transmission solenoids:

  1. Delayed or irregular gear shifting: Delayed or irregular gear shifting means that the transmission does not transfer gears properly or at the right time.
  2. Transmission ‘Hunt’ for Gears: It is the situation when the transmission repeatedly shifts between gears before selecting the proper gear.
  3. Transmission slips or Vibrates: When the transmission slips and does not engage correctly with the gears, the truck shakes or ceases while shifting gears.
  4. Transmission Limp Mode: Limp mode is a security feature that the transmission activates when it notices an issue. It reduces the engine’s power and shifts into a lower gear to stop further damage to the transmission.

Cause of Toyota Tundra Solenoid Problems

The following 6 factors are mainly responsible for the above problems:

  1. Low transmission fluid: Low or insufficient transmission fluid can rapidly break down the gears and bearings, which may result in inconsistent shifting and other issues.
  2. Bad transmission solenoid: The transmission solenoid controls the transmission fluid’s flow to different parts of the transmission. When the solenoids wear out, the transmission shifts gears in delay.
  3. Defective transmission control module (TCM): The Transmission Control module, or TCM, is the root of the transmission system. The transmission fails to work properly when there is an error or defect in the TCM.
  4. Worn transmission gears: If the gears are worn out, the transmission shifts gears irregularly or with delay.
  5. Electrical problems: Electrical problems, such as a defective sensor or a poor wiring system, can cause the transmission to shift incorrectly.
  6. Worn transmission clutches: Transmissions slip or vibrate due to worn-out bands or clutches.

Symptoms of Toyota Tundra Solenoid Problems

By paying attention to these 9 primary signs, you can identify when Toyota Tundra transmission solenoids malfunction:

  1. The transmission may not shift gears lightly or at the right time.
  2. The truck shakes while shifting gears.
  3. You may hear strange noises from the transmission.
  4. The check engine light or transmission light flashes.
  5. The transmission shifts between gears before selecting the right gear.
  6. The transmission slips when you accelerate the truck.
  7. The truck shakes or vibrates while shifting gears.
  8. The transmission shifts into lower gear and reduces the engine’s power. (Limp Mode)
  9. The truck may not accelerate as fast as usual.

Solutions to Toyota Tundra Solenoid Problems

Now, I will discuss how you will address all the issues. I have covered the solution to each issue here.

  • Low transmission fluid: At first, check the transmission fluid level and ensure the transmission fluid is sufficient or at the right level. Add proper transmission fluid as needed if the fluid is low or insufficient. If the transmission fluid is too old or contaminated, flush and drain out the old fluid and use a new transmission fluid.
  • Bad transmission solenoid: Inspect the transmission solenoid and replace it if it is worn out.
  • Defective transmission control module (TCM): Examine the Transmission Control Module. If you find it defective, replace it and install a brand-new TCM.
  • Worn transmission gears and clutches: Check out the transmission gears and clutches and cut out these parts if necessary.
  • Electrical problems: When you identify any kind of electrical issue with the transmission solenoids, you should contact a mechanic to solve the issue.

Note: Whenever you notice any of the above symptoms, you should contact a mechanic, who will help you identify the exact problem and provide appropriate solutions.

Toyota Tundra Transmission Solenoid Replacement Cost

You must be wondering how much it might cost to fix these problems!

I’ve charted the cost of all the parts needed to fix the above problems:

Parts or Elements


Transmission fluid


Transmission solenoid

Transmission control module (TCM)


Transmission gears


Transmission clutches


Also, a mechanic will charge you up to $500.

Note that all costs will depend on where you live and how defective your truck’s transmission solenoid is.

Tips to Prevent Transmission Solenoid Problems in the Future

Follow these 6 tips to keep the transmission solenoid working for a long time:

  1. Check transmission fluid regularly and change it if necessary.
  2. Always use good-quality transmission fluid.
  3. Flash transmission fluid regularly when it is too old or contaminated.
  4. Don’t shift gears forcefully.
  5. Avoid driving in adverse weather and towing massive loads.
  6. Be alert for all symptoms of the transmission solenoid.


Although the transmission solenoid is small, it is an important part of your truck. So it is important to take proper care of it to keep it effective.

I hope you already have a clear idea about the transmission solenoid. Next, contact a mechanic for any problems with the solenoid and take the necessary action.

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