What Does The TCC Solenoid Do?
The main function of the toque converter clutch or TCC solenoid is to send pressurized fluid to the torque converter’s clutch allowing it to achieve lock up in 4th gear based on a signal from the engine control module (ECM). The valve opens allowing for fluid to apply the TCC, and when the signal stops, the fluid is then vented out which will then disengage the clutch.
Until engine temps reach a certain point, the TCC solenoid will not allow for lock up.
In essence, the TCC solenoid is like a computer controlled on and off switch for your 4l60e’s torque converter lock up.
Where Is The TCC Solenoid Located
The 4l60e TCC Solenoid is located on the front passenger side of the transmission near the valve body. The image below shows the locations of various solenoids.
Symptoms Of Failing TCC Solenoid
When your 4l60e’s TCC solenoid begins to fail, there are a number of obvious signs. The main symptom of a TCC solenoid failure is the converter is not locking up. When the converter is not locking up you will notice the engine’s RPMs staying higher under load at highway speeds.
Another symptom of a failed TCC solenoid is a fault code. Common codes associated with a TCC conditions include:
- P0740 – Torque Converter Clutch Circuit Malfuction
- P0741 – Torque Converter Clutch Circuit Performance or Stuck Off
- P0742 – Torque Converter Clutch Circuit Stuck On
- P0743 – Torque Converter Clutch Circuit Electrical
- P0744 – Torque Converter Clutch Circuit Intermittent
- P01870 – Component Slipping
4l60e TCC Solenoid Test & Replacement
Testing and replacing your 4l60e TCC solenoid is not as daunting of a task as you may think. If you have ever changed your transmission fluid and filter, then you are capable of replacing the TCC solenoid yourself.
The best way to test the TCC solenoid is to measure the OHMs and make sure its within a suitable range. If it is not, then simply replace it.
The video below does a great job of showing and explaining the step by step process for testing and replacing your 4l60e TCC solenoid.
How Much Does It Cost To Replace A 4l60e TCC Solenoid?
The cost associated with replacing a 4l60e TCC solenoid is not too bad, especially if you’re comfortable doing it yourself. Typically the TCC solenoid itself costs under $30, so between that and fluid and a new filter (might as well change that while you’re in there), you can be less than $100 into replacing a TCC solenoid yourself in a few hours.
If you were to pay a shop, you can expect to pay somewhere between $250 – $500 depending on the labor time needed to do the job.