Torque Converter Clutch solenoid

Alex Kurdian · Post by **Alex Kurdian** » Thu Sep 03, 2009 11:21 pm

Hi
For a 4 speed Auto Trans....Can anyone tell me what the Torque Converter Clutch (TCC) solenoid does...and how do you know if its gone bad or going bad,

what symptons do you look for?

NickKo · Post by **NickKo** » Sat Sep 05, 2009 6:09 pm

If your TCC circuit or switch is going bad, you would almost certainly get a CEL (Check Engine Light) and associated trouble code.

Basically, the T/C Lockup, "locks up" the converter when you are at a steady highway speed, to help increase gas mileage and keep the RPM's a little lower.

- Nick

jT · Post by jT » Mon Sep 07, 2009 2:07 pm

I'm not positive but I think the TCC Solenoid and the Lockup are two different parts. Back when I was researching my TCC Solenoid problem I saw people mention a $6 lockup part.

The TCC solenoid does have a CEL code, so if it were going bad then you should get one. I did!

As for symptoms, I dont quite remember what mine was doing, I think maybe sounding like it was driving in 2nd gear rather than 3rd.

NickKo · Post by **NickKo** » Mon Sep 07, 2009 4:14 pm

jT wrote:I'm not positive but I think the TCC Solenoid and the Lockup are two different parts. Back when I was researching my TCC Solenoid problem I saw people mention a $6 lockup part.

The TCC solenoid does have a CEL code, so if it were going bad then you should get one. I did!

As for symptoms, I dont quite remember what mine was doing, I think maybe sounding like it was driving in 2nd gear rather than 3rd.

True, they are separate.... the TCC solenoid controls the lockup.

- Nick