How to fix my torque converter clutch when it’s

Bad torque converter clutch control sensor is stuck how can I fix it

My car has 208021 miles.
My car has an automatic transmission.

Experienced mechanics share their insights in answering this question :
Hey there. If you are getting Diagnostic Trouble Code P0740, that means there is a fault in the torque converter clutch circuit, which includes the solenoid malfunction.

The solenoid itself (it’s a solenoid, not a sensor) has to be tested to be sure it has really failed because there are several other possibilities for what might appear to be a stuck solenoid including things as mundane (and easily resolved) as low or dirty transmission fluid and/or a plugged transmission filter. Wiring faults can even account for the code setting. If the solenoid is indeed bad, this is a standard on the vehicle repair that can be performed in the field by YourMechanic, but it is recommended that you have an expert diagnose the code so that this can be corrected properly.

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When the torque converter starts malfunctioning, you may feel shuddering and even slipping in overdrive. You usually notice your car shuddering because it feels like it`s vibrating. Your car will vibrate even when you`re not going very fast. The shuddering makes the car lag and is very noticeable.
Fortunately, however, torque converters can be repaired. The repair of the torque converter requires quite a lot of special equipment for cutting it off, measuring, assembling, gluing clutch discs, welding, quality control, and so on.
What the P0741 code means. The Powertrain Control Module (PCM) will set the P0741 diagnostic trouble code when it notices a difference between the rotational speed of the torque converter and the transmission input shaft that is greater than 200 revolutions per minute (RPM).
Driving a vehicle under these conditions may cause damage to other internal transmission parts. A P0741 DTC in itself is very serious and should be addressed as soon as possible and handled with adequate repairs.
Can I drive my vehicle with a P0741 trouble code and illuminated CEL? You may drive your vehicle with a P0741 however keep in mind your vehicle will not pass a smog inspection. Problems with the torque converter clutch operation may cause drive-ability symptoms.
The likely culprit will be a faulty torque converter, and we recommend not driving the car until you fix it.
The fluid pressure that applies and releases the torque converter lockup clutch is controlled by the torque converter clutch solenoid. The opening and closing of the TCC solenoid valve is controlled by the transmission control module (TCM) or powertrain control module (PCM), depending on the vehicle.
Torque converter clutches help to lock the transmission and the engine into direct drive. However, a damaged torque converter can cause the car to stay in gear even when the driver has come to a stop. This converter also can lock into direct drive especially if the clutch plate`s friction material has worn away.
The likely culprit will be a faulty torque converter, and we recommend not driving the car until you fix it.
The likely culprit will be a faulty torque converter, and we recommend not driving the car until you fix it.
Many torque converter failures can be caused by excessive friction, which means the torque converter`s needle bearings are damaged. Also, a faulty seals or faulty clutch solenoid can be to blame. A faulty seal can allow fluid to leak and become contaminated. A bad torque converter can damage a transmission.

Relevant Questions and Answers :

the most relevant questions and answers related to your specific issue

How to fix my torque converter clutch when it’s
ANSWER : Hey there. If you are getting Diagnostic Trouble Code P0740, that means there is a fault in the torque converter clutch circuit, which includes the solenoid malfunction.

The solenoid itself (it’s a solenoid, not a sensor) has to be tested to be sure it has really failed because there are several other possibilities for what might appear to be a stuck solenoid including things as mundane (and easily resolved) as low or dirty transmission fluid and/or a plugged transmission filter. Wiring faults can even account for the code setting. If the solenoid is indeed bad, this is a standard on the vehicle repair that can be performed in the field by YourMechanic, but it is recommended that you have an expert diagnose the code so that this can be corrected properly.

my clutch went out on my truck? i got the clutch fixed but now the truck will not start. what do you think is wrong??
ANSWER : The anti theft system may be causing the no start. Look at the theft light when you are cranking the vehicle. If the light is on then the system is active and preventing the vehicle from starting. Try to close all the doors and hood, then lock all the doors with the remote. Unlock the doors again and try to start the vehicle. If it starts then you are okay. If it still says anti theft is active then you will have to have the system checked to see if the anti theft module is in need of repair or replacement. If the anti theft light is not on then you will need to have the vehicle checked by a mechanic to see if you are getting spark and fuel and diagnose those areas. You could remove and clean off the crank shaft sensor in the bell housing since it could be covered in clutch debris causing the no start due to no RPM signal. If you need assistance, a certified mobile mechanic can visit your home or office to inspect your vehicle’s no start issues.

How do you remove the torque converter bolts off the flywheel? 2005 GMC Envoy Denali
ANSWER : Hello – with the vehicle safely supported to provide clearance underneath – in between the engine oil and transmission pan, there is a large, funnel-shaped aluminum casting (called the bellhousing), that physically mounts the engine to the transmission. At the forward vertical face of the bellhousing (immediately behind the engine oil pan), is an access plate – remove it. The engine flywheel/flex plate is now exposed. There will be 3-4 bolts, which go through the flex plate to the torque converter, which hold the torque converter to the engine flywheel/flex plate. Turn the crank from the front crankshaft pulley bolt (CLOCKWISE facing the nose of the engine) a bit, remove a bolt, turn the crank a bit further, remove the next bolt, etc. until all the torque converter bolts are removed. At this point, you should be able to slide the torque converter toward the rear of the vehicle 1/4-1/2" by hand. This will confirm that all bolts are out. You will also be able to rotate the torque converter by hand, without turning the engine. Remember this when re-assembling the engine/transmission, and it becomes to rotate the torque converter to line up the bolt holes in the flex plate. Proceed with the removal of the transmission.

My clutch is not working Entire clutch repair or clutch master cylinder repair? How do I check the cylinder?
ANSWER : Hi there. Check the slave cylinder to the clutch and see if the piston is all the way out. If the piston is all the way out or its not touching the clutch fork, then the release bearing has broken and the fork has moved into the clutch. If the slave cylinder is relaxed and the fork is against it, then the clutch pressure plate has sprung a pressure spring. If the pedal can go down but not all the way to the floor, then the clutch needs replaced with a new release bearing. If you need further assistance with a clutch replacement, then seek out a professional, such as one from Your Mechanic, to help you.

When replacing my fan clutch should I change my cooling fan to a flex-a-light and get a new flex-a-light clutch?
ANSWER : Hi there. It is best to always put on the OEM parts that are required for the vehicle. However, you can get a flex-a-light clutch fan for your vehicle as long as it will bolt up to your water pump pulley and clear the radiator and shroud. I recommend having a clutch design fan for your vehicle and not a fan that spins with the engine all the time. Those fans will cause the engine to overheat on highways and in town especially in hot weather. If you need further assistance with your cooling fan, then seek out a professional, such as one from Your Mechanic, to help you.

Clutch pedal stays to floor. Replaced master cylinder. Clutch push rod broke. Also do I need to change slave cylinder
ANSWER : If you have an issue with your clutch pedal going to the floor, the slave cylinder is normally the cause of this circumstance.

Also, if the push rod has been broken the first step would be to track down a new one because that push rod is a very necessary part of the clutch pedal system.

Once a new push rod has been located and installed, I would recommend having a new slave cylinder installed as well.

If you are in doubt about this repair, I would recommend having it performed by a qualified professional, such as one from YourMechanic. One of our mobile technicians will be able to come to your home to diagnose the issue with your clutch pedal and replace your clutch slave cylinder as necessary.

I can’t go into 4th or 5th gear and clutch does not engage after a recent clutch job, clutch release while in gear does nothing.
ANSWER : I would rule out the axle not being pushed all the way in. That would effect all speeds and gears. That you can engage gears other than 4th and 5th leads me to 2 m possibilities:
1. Shift linkage mis-adjusted.
2. Possible bent shifter fork internally.

If it feels like you can engage 4th and 5th with the engine OFF, then I would lean towards a clutch release issue.

Replace Faulty Torque Converter Clutch Solenoid code
ANSWER : Hello. If the Check Engine Light has come on for a faulty torque converter clutch solenoid, it is likely that the solenoid needs to be replaced. The torque converter clutch solenoid is an important part of the vehicle’s transmission system, it tells the vehicle when to shift. When it fails, the vehicle may experience reduced performance, erratic shifting, and the Check Engine Light will come on. As the torque converter solenoid is often located underneath the vehicle, I would recommend having a professional technician, such as one from YourMechanic, diagnose the vehicle and if necessary, replace the solenoid.