07 Cobalt LT Coupe P0700 & P0741 - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Transmission All about the Chevy Cobalt Transmission

Closed Thread
 
LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 05-27-2014, 11:21 AM Thread Starter
Prospect
 
Join Date: May 2014
Posts: 20
07 Cobalt LT Coupe P0700 & P0741

Hello, getting codes P0700 along with P0741. Car is 07 Cobalt LT coupe. 2.2 Auto.

The car runs great. If I erase the code and just drive around town it won't come back on. It will come on once I get on the freeway, and even then the car still feels good at 75 mph, no hiccups or anything.

Could it be the Torque converter clutch solenoid?

Can someone post a DIY thread on how to replace it or how to fix this?

Thanks,
07colby is offline  
Sponsored Links
Advertisement
 
post #2 of 13 (permalink) Old 05-27-2014, 01:41 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
I would first verify fluid levels at full operating temperature. The torque converter will have a hard time keeping lock up if oil is low because oil pressure drops. TC could also be limited by dirty oil, you could add a bit of transmission fix fluid to increase torque converter pressure.

Circuit Description
The torque converter clutch (TCC) solenoid valve is a pulse width modulation (PWM) solenoid. When vehicle operating conditions are appropriate for TCC application, the transmission control module (TCM) begins the TCC duty cycle at approximately 42 percent. The TCM then increases the duty cycle up to 90 percent, in order to achieve full TCC apply pressure.

When the TCC PWM solenoid valve is de-energized, the solenoid blocks filtered 2-3 drive fluid, and allows TCC signal fluid to exhaust. When energized, the solenoid modulates fluid into the TCC signal fluid circuit. When fully energized, modulation stops, and the solenoid blocks both 2-3 drive fluid and TCC signal fluid exhaust.

When the TCM detects a high TCC slip speed when the TCC is commanded ON, then DTC P0741 sets. DTC P0741 is a type B DTC.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
post #3 of 13 (permalink) Old 05-28-2014, 07:47 AM Thread Starter
Prospect
 
Join Date: May 2014
Posts: 20
I had checked it and the trans fluid did seem full, but the little bit that dripped out, was dirty brownish colour. From what I had read it is supposed to be like a redish colour right?

So was thinking of changing it and the filter, so figured might as well change the torque converter clutch solenoid at the same time since its not that expensive. But don't exactly know where it is at XD can you post where it goes?

Thanks,

Last edited by Coby7; 05-28-2014 at 10:24 AM.
07colby is offline  
 
post #4 of 13 (permalink) Old 05-28-2014, 01:21 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
You have to remove the side cover.


Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
post #5 of 13 (permalink) Old 05-28-2014, 02:28 PM Thread Starter
Prospect
 
Join Date: May 2014
Posts: 20
Awesome, Thanks!

Haven't done anything yet but can you please post that too?

That way it will go a lot better when get into it. Will already know what to look for and how to do it.
07colby is offline  
post #6 of 13 (permalink) Old 05-28-2014, 04:19 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
Start by changing old fluid and filter, maybe that will loosen up the TTC solenoid and you won't need to go any further. You can still add half a bottle of "Lucas" transmission fix to help clean and swell some of the seals. It won't hurt anything, I always add some to my transmission after 60000 miles. I've owned 19 GMs and I've never had a transmission problem ever. My Mitsubishi has 418600 Kms and it's still going. Preventative maintenance speaks for itself.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
post #7 of 13 (permalink) Old 05-29-2014, 07:49 AM Thread Starter
Prospect
 
Join Date: May 2014
Posts: 20
Dropped the pan last night to change the fluid and filter. Erased the code. Tested it out, drove around town, and got on the freeway, doing 75 mph and no check engine light! Going through the gears and while driving, it does feel like it is shifting a lot smoother now.

Did not add any of the lucas that you were talking about, will have to see if I can find some to add.

Thinking I might do it again in a few weeks, maybe, so that the rest of the old fluid that was still in there will mix with the new, and then when I drain and add more again, it will have a lot more new fluid then old left over.
07colby is offline  
post #8 of 13 (permalink) Old 06-04-2014, 04:08 PM Thread Starter
Prospect
 
Join Date: May 2014
Posts: 20
The codes came back :/

Would love to get how to change out the TCC Solenoid.
07colby is offline  
post #9 of 13 (permalink) Old 06-04-2014, 04:18 PM
Super Moderator
YourCobalt.com Premium Member


 
Coby7's Avatar
 
Join Date: Oct 2011
Location: Magnetic Hill, New-Brunswick
Posts: 11,820
Garage
Better left in capable hands of people that do it all the time, but if you want to try it it's possible and just needs patience. Have you tried the Lucas transmission fix or similar additives? This stuff dilutes in the oil so you don't have to worry about overfilling. Like when you add a litre of alcohol to a litre of water and only get 1.5 litres total.

Every minute spent angry is a happy minute lost for ever and ever!!!
Drives 2016 Cocoa Buick Encore 1.4L Turbo auto KL4CJDSB2GB652675
Drives 2016 Sunset Orange Trax LT1 1.4L Turbo auto 3GNCJPSB8GL142716

Never drive faster than your guardian angel can fly
Coby7 is offline  
post #10 of 13 (permalink) Old 06-12-2014, 02:26 PM Thread Starter
Prospect
 
Join Date: May 2014
Posts: 20
Can you please post the repair manuel so can change it out, thanks, or just the pages needed that cover it to do the work, been looking online but cant find anything.

Thanks,
07colby is offline  
Sponsored Links
Advertisement
 
Closed Thread

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome