Q: TCC solenoid converter

asked by on

Hi, I have a 2005 Jeep Wrangler 4.0L 6cylinder automatic.. I have a check engine code P0743 which I looked up and indicates a TCC convertor issue... I took it to Mieneke and they couldn't help me... engine runs good, no slipping or anything, it will shift at higher speeds with no problems, smooth shifting, the car does struggle after 55MPH, slight vibration, also note that the check engine light will go off if I do not drive passed 50MPH, but when I do the check engine light will go on.. I am not sure what the problem could be? Any help would be much appreciated! Would like to know if there is a specific part that needs to be replaced? I am good with working on cars and working with my hands, I am just horrible at diagnosing problems! Thank you so much

My car has 130000 miles.
My car has an automatic transmission.

Code P0473 indicates a fault with the Torque Converter Clutch Solenoid inside the transmission. P0743 is usually a problem with the electrical side of the TCC solenoid, wiring or trans control relay. It is a repair that any reputable transmission shop should be able to take care of. The transmission pan will have to be removed to access the TCC. It is mounted along side the valve body - which may also have to be removed to make the repair. The torque converter connects the engine and transmission. The converter "locks up" - locks the engine and transmission together in a one to one ratio for efficiency. When the solenoid fails, lock-up does not occur so engine rpm’s may stay higher at highway speeds reducing fuel economy and potentially making the transmission run hotter. The repair should be performed as soon as possible to avoid this. Be sure fresh transmission fluid and a filter are installed along with the repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. TCC solenoid converter

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fuse A/C power windows

Hello, thanks for writing in about your 2005 Kia Spectra5. It sounds like those systems may all share that same fuse and one of them is drawing too many amps, or there is a short in the circuit. I wonder...

Q: Driver's side window won't work.

If your driver side window is not going up, it is possible that the regulator or motor has failed. Sometimes they come together as one unit, sometimes the motor is replaceable by itself. I would recommend having the vehicle looked...

Q: Where is my coolant going? My car keeps overheating and blowing cold air. The temperature rises when stopped and drops when accelerating.

Look everywhere around the engine and see if there is a split hose or loose hose clamp. If the hoses and clamps are in good shape and tight, then check the core plugs (freeze plugs) and see if there is...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...