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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P0743 - Torque Converter Clutch Circuit Electrical
- Engine Light ON (or Service Engine Soon Warning Light)
- Faulty torque converter clutch solenoid valve - Torque converter clutch solenoid valve harness or connectors - Torque converter clutch solenoid valve circuit is open or shorted - Low transmission fluid level - Dirty transmission fluid
This is an electrical problem code. Could be a problem to the harness to the TCC solenoid, the TCC solenoid connector or the TCC solenoid it self.
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.
P0740 JEEP Description 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.
It is in the transmission bolted to the valve body. You have to remove the bottom pan to get at the solenoid. The 3-4 shift solenoid and the Torque converter clutch solenoid and built together on the same bracket.
U have a problem in the transmission torque converter clutch control circuit, most likely the solenoid switch that applies the lock up clutch of the torque converter is defective or a the torque converter itself is defective, the trans pan will need to be removed to check the problemfurther.