TwinTurbo.NET: Nissan 300ZX forum - The lockup solenoid is usually to lockup the
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Subject The lockup solenoid is usually to lockup the
     
Posted by MixManMash on February 19, 2018 at 7:15 AM
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In Reply To Auto transmission code posted by Bigmatthew86 on February 18, 2018 at 07:29 PM
     
Message torque converter. It typically locks up once at speed. It helps with fuel economy as the torque converter essentially being a fluid clutch has significant losses. When it locks up, it is directly coupled with the engine.

You should check continuity of the wiring harness to the solenoid using a multimeter and the solenoid itself. If the solenoid is open circuit, it has likely failed.

     
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