TCC solenoid

[Ken M]

93 Buick century 3.3L with a 3T40 3spd auto trans. Can the torque converter lock-up solenoid be replaced with out droping the trans?

Topic

[BigC]

Hi Ken M,

According to the information at Chilton’s Library, here are the first few steps when removing the Transmission (below). Based on this information, the electrical connection off the TCC should be able to be removed without removal of the transmission. Now it is just a question of whether the TCC can be excised as well, without moving the transmission. Do you know where the TCC is located on this transmission? Good luck and keep us posted.

1. Remove the air cleaner assembly from the vehicle.
2. Disconnect the shift cable from the lever and bracket at the transaxle.
3. Detach the TV cable at the transaxle and throttle bracket.
4. Detach the electrical connections at the neutral safety switch, Torque Converter Clutch (TCC), and Vehicle Speed Sensor (VSS).
5. Remove the upper transaxle-to-engine bolts, including the electrical grounds.
6. Install tool J-28467-A the engine support fixture.

[619DioFan]

Quoted From Ken M:

93 Buick century 3.3L with a 3T40 3spd auto trans. Can the torque converter lock-up solenoid be replaced with out droping the trans?

Should be an access panel on the drivers side of the trans. best to get the d-side wheel off for more access. tcc should be fairly easy to remove/replace.( should be able to do this with out pulling the trans )

[renaud]

if you dont want to remove transm.. just disconnect the square plug (i think its in on front below the air filter) and try it(road test) but your lock up is desactived you gonna have just 3 speeds–more rpm more gas

[EricTheCarGuy]

There have been some great suggestions on this however I think the most important thing is to make sure that the electrical part you are replacing is the cause of the fault if not it would be a big waste of time.

[Ken M]

Quoted From EricTheCarGuy:

There have been some great suggestions on this however I think the most important thing is to make sure that the electrical part you are replacing is the cause of the fault if not it would be a big waste of time.

Hey Eric, thanks for the post. Unfortunately it is the lockup solenoid. The TQ. converter wasn’t disengaging so I spliced the wires to and from the solenoid together and now it’s drivable, but I’d rather fix it than just patch it…..yuck. Love what you do and how your doing it- keep on rocking!!!

[Trcustoms719]

Would the car stall as soon as you put it in gear before disconnecting the TCC?

[Ironman]

Hey Guys, My uncle has a 97 Chevy k1500

[Trcustoms719]

Could you post the exact code number?

[Ironman]

Sure thing the code is P1860

[dreamer2355]

DTC P1860 is set if PCM detects a continuous open or short to ground in the TCC PWM solenoid circuit.

Ignition voltage is supplied directly to the solenoid through a fused circuit. The Powertrain control module commands solenoid on or off by applying or removing the ground.

I would locate a wiring diagram and start checking for voltage using a DVOM.

[djdevon3]

Check the harness for potential breaks where it might be shorting out including bad contacts with the solenoid connector.

[EricTheCarGuy]

It does seem like the problem is not the solinoid, I’m with checking the signal from the ECU to make sure it’s getting there and that the solinoid has power like it’s suppose to. Keep us posted.

[Author]

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