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Old 25-02-18, 12:32 PM   #1
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Unhappy Can I disable torque converter lock-up clutch?

Hello Guys,

I have a 2009 308SW w/1.6L direct injection Turbo with AL4 that seems to have a problem in an automatic transmission lock-up clutch. I feel the car jerks while driving at constant speed around 60-70km/h.
I read out the DTC and had P0741 Torque converter clutch circuit performance/stuck-off.
I took the car to a workshop. They said I have to replace the whole transmission.

I'm wondering if I can disable the torque converter lock-up clutch.
I guess one of the wires that is connected to the transmission is for the clutch.
Maybe I can disable the clutch by simply cutting or adding a resister to the wire.
Does anyone know which pin of the transmission connector is for the lock-up clutch?

Last edited by PokaQ; 25-02-18 at 12:47 PM.
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Old 25-02-18, 01:43 PM   #2
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No chance what you think you can do will actually do what you want to do these gearboxes are controlled by the ecu and the lock up is variable based on engine power throttle position vehicle speed altitude etc etc its not just an on off device
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Old 25-02-18, 02:28 PM   #3
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Try changing the fluid, wait a week and change it again. Claims that the transmission is sealed for life are nonsense when you see the condition of the old fluid.
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Old 25-02-18, 02:49 PM   #4
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It's untrue to say you have to change the whole transmission. The clutch is controlled by two hydraulic valves, and they probably need cleaning or replacing. A company which specialises in AT should have no problem doing the job.
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Old 25-02-18, 08:08 PM   #5
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Quote:
Originally Posted by IanML View Post
It's untrue to say you have to change the whole transmission. The clutch is controlled by two hydraulic valves, and they probably need cleaning or replacing. A company which specialises in AT should have no problem doing the job.
^^X2^^

A reputable transmission shop should also be able to make an accurate diagnosis as to what is actually wrong as well.
When the lock wasn't working on an Oldsmobile I once owned it used noticeably (but not drastically) more petrol.

Roger.
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Old 28-02-18, 09:38 AM   #6
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Thank you everyone for your advice. I'll try changing fluild first. I hope it makes the symptom better.
I also look for a transmission repair shop that can fix it cheaper.
Thanx!
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