GM 4L60E TCC Solenoid Overview

Excellent- a word that always comes handy to define the best performance out of everything that you want to engage in your service. Here we’re opened to have a discussion about a kind of component that is a part of the mechanism of a vehicle doesn’t matter if it is a person carrying or goods carrying one.

It is Torque Converter Clutch Solenoid or in short TCC Solenoid. It is an integral part of your vehicle’s functional system that controls the smooth movement as well as the temperature of the vehicle’s engine. TCC Solenoid is not a kind of device that can be explained at one go. It needs to be defined in steps to get a clear idea about it. So, let’s go to see the first look.  

The First Look

If you see inside the engine you’ll find a device located between the rear of the engine and the front of the transmission that is called a Torque Converter. It works to transfer the engine torque and the power to the transmission using hydraulic pressure.

Torque Converter Clutch[TCC] is a part of the torque converter that connects the transmission with the engine and helps them to rotate at the same pace. Besides, it works to reduce the temperature of the transmission fluid only to increase the mileage of the fluid. 

The Torque Converter Clutch[TCC] Solenoid is nothing but a part of automatic transmission that controls the pressure of the transmission fluid on the torque converter clutch. It transforms the electrical signals to the mechanical functions and helps to support the converter clutch so that it can engage or disengage properly.

What Does The TCC Solenoid Do?

If you ask for the function of the TCC Solenoid then it can be said that this electronic device is up for controlling the pressure of the transmission fluid while it flows down the torque converter clutch. In this way, the solenoid helps the clutch to achieve the lock-up in the 4th gear after being followed by the signals provided by the transmission control module[TCM]. Besides, the TCM also takes care of the TCC solenoid valve and allows it to open and close to supply or stop the flow of the transmission fluid as the transmission requires. Apart from that, the TCC solenoid allows the fluid to enter the clutch only when the temperature of the engine reaches a certain point.  

Where The TCC Solenoid is Located in 4L60E?

4L60E TCC Solenoid

Usually, the TCC solenoid is seen between the rear of the engine and the front of the transmission. But as for the 4L60E you find it on the front passenger side of the transmission close to the valve body. This location helps you to observe it quite clearly and also allows you to do the necessary repairing or replacement job conveniently.

Symptoms of Failing TCC Solenoid

Torque Converter can be found in vehicles that are equipped with automatic transmission such as 4L60E transmission generally seen in vehicles from GM Company. Although this device is durable enough, like any other machine it also goes bad with time. And then your vehicle starts showing some signs that indicate failing TCC solenoid. Among many others, the most common symptom is a slipping transmission during acceleration. Let’s go and check them out in detail for your convenience. 

Transmission Slipping

The torque converter requires building up the right pressure so that it can help the car moving forward. But while in gear and the engine revs up but your vehicle doesn’t accelerate, then it confirms you that it is nothing but a case of slipping transmission.

Rough Acceleration

Smooth or systemic acceleration is one of the main terms for a pleasant driving experience. But if you are experiencing rough acceleration while driving your vehicle then you can blame the defective torque converter for this trouble that you have least expected. A faulty torque converter can peak different or uneven pressure

Not Moving in Drive or Reverse

As you have got an idea that a torque converter plays a big role in the movement of a vehicle along with many other factors. Therefore, if the other factors have no issue and still your vehicle is not moving at All in drive or in reverse gear then a bad torque converter could be the cause of it for sure.

Overheating of Transmission

A bad torque converter is the cause of many issues with your vehicle and one of them is overheating of the transmission. While driving if you find the transmission fluid gradually becoming hot through the temperature sensors of your vehicle, it would be due to torque converter slips that wear out the transmission in no time, and even you’ll find the fluid boiling.

Noise from The Transmission

While idling or accelerating your vehicle if you find sounds like knocking or some other kind coming from the middle of the vehicle under the gear stick, then it ensures you that the torque converter of your vehicle has gone bad.

Diagnostic Trouble Codes

This is one more symptom that probably gives you the most prominent indication of the bad torque converter. If the torque converter occurs any fault then it sets a Diagnostic Trouble Code[DTC] and that makes the Check Engine Light to flash on. Generally, if anything goes wrong with the TCC Solenoid, an open circuit with the system, or any problem in the TCM you can find the DTC code P0704.

This is not the only one but there are some other codes to show the different issues related to the other parts of the system. Such as-

  1. P0741 TCC Circuit Stuck Off
  2. P0742 TCC Circuit Stuck On
  3. P 0743 TCC Circuit Electrical
  4. P0744 TCC Circuit Intermittent
  5. P01870 Component Slipping   

4L60E Solenoid Test and Replacement

Testing a 4L60E TCC solenoid is not an uphill task to perform. The best and the simplest way is to take the torque converter apart and try to find any sign of wearing on it. But there are some other ways to know the condition of it. Here they are-

  1. Start the engine of your vehicle and wait for transmission fluid to warm up to around 40°C.
  2. Apply the drive gear and try to catch and noise coming from the torque converter. If there is no such sound while driving the vehicle forward then move on to the next step.
  3. Now drive the vehicle at a high speed. If you see that the vehicle revs up without proper acceleration then the torque converter might be slipping.
  4. To check the condition of the TCC solenoid it’ll be better to measure if the OHMs are in a normal range.

The Replacement

To replace a faulty 4L60E TCC solenoid and install a new one. Although replacing this device is not an easy job that can be done as a DIY. Because, to replace this device requires removing all the supporting units such as the battery, air filter, other solenoids, and even the transmission fluid is also to be drained out to refill the fresh one. All these jobs perfectly can be done only by an expert and you have shell out a some of amount for this purpose.


Whatever I have explained so far to describe the overview of the 4L60E TCC solenoid from the best of my knowledge and research hopefully is quite enough to enrich your idea about it. So now it is time to wrap up the whole matter. Time to go, have a nice day!!!

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