Question about 1998 Jeep Wrangler

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Locationof the Torque Converter Clutch Solenoid

I need to know the location of the Torque Converter Clutch Solenoid on a 1998 Jeep wrangler, check engine light came on, had it checked and turned off, and the tranny (torque converter) went out before i got it hm, is this a norm caused by the soleniod, or could it be something more,
the jeep is a 4.0, with the 3 speed automatic tranny

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  • Richard Scordino Jan 09, 2009

    I need the same information but for a different reason... I believe I have a solenoid that may be hanging up before engaging. I found a source and can easily replace it, but there are three solenoids. It's really cold and snowy out. I want to know where I'm going BEFORE I get under there and open it up!!

  • Richard Scordino May 11, 2010

    The question was where is the t/c solenoid, there are three on the valve body...which one is it??

  • Anonymous Mar 12, 2014

    Put in used transmissiin but never adjusted torque converter and drove like thst for a few miles was making a humming noice did it damage my tranny

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Your transmission should still work if the solenoid goes bad. It will just shift funny

Posted on Jan 30, 2009

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P1860 CODE CHEVY S10 TRUCK 1998


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- Torque converter clutch solenoid valve circuit is open or shorted
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1998 jeep grand cherokee 4x4. have the p0740 code. have to start from neutral, then shifts faily well. May start fluttering and making noise, have to put back to N, then to D and once again will shift. ...


P0740 JEEP - Torque Converter Clutch Circuit
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission shift shock
- Vehicle may not shift into the highest gear

Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty torque converter clutch solenoid valve
- Torque converter clutch solenoid valve harness or connectors
- Torque converter clutch solenoid valve circuit is open or shorted

When is the code detected?
Torque Converter Clutch (TCC) unlocked for 10 sec., ECM commands converter lock-up and did not record engine speed drop.

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The torque converter clutch solenoid valve is activated, with the gear in D4, by the Transmission Control Module (TCM) in response to signals sent from the vehicle speed and the Engine Control Module (ECM). Lock-up piston operation will then be controlled. When the torque converter clutch solenoid valve is activated, the torque converter lockup clutch will engage creating a 1 to 1 RPM ratio between the transmission input shaft and the rotational speed of the torque converter.

Lock-up operation, however, is prohibited when A/T fluid temperature is too low.

When the accelerator pedal is depressed (less than 2/8) in lock-up condition, the engine speed should not change abruptly. If there is a big jump in engine speed, there is no lock-up.

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