2006 buick lucerne 3.8 stuck in second gear. And won't shift. No codes or check engine light

[2007LucerneCXL]

MAF, PCM, harness, etc it's a guess over a forum without data or being on site. Taking it to a professional transmission shop to at least get a proper diagnosis and procedure from there.

 

[Jt601]

MAF, PCM, harness, etc it's a guess over a forum without data or being on site. Taking it to a professional transmission shop to at least get a proper diagnosis and procedure from there.

I did, I took it there first. They didn't find any codes

 

[BuickGirlFromMars]

I did, I took it there first. They didn't find any codes

thats what we are saying tho, if they know what they are doing there is a lot more to be had than Just codes. I dont believe they really did anything because they would know it has a transmission computer separatre the PCM and different codes that may require canbus access to read(Im not sure on that part) and they at the very least could command it to shift to a different gear and based on it not douing anything and saying high pressure know that means something

 

[Jt601]

thats what we are saying tho, if they know what they are doing there is a lot more to be had than Just codes. I dont believe they really did anything because they would know it has a transmission computer separatre the PCM and different codes that may require canbus access to read(Im not sure on that part) and they at the very least could command it to shift to a different gear and based on it not douing anything and saying high pressure know that means something

I was in the car with the technician, and he tried to shift it with scan tool while driving. And it wouldn't shift.

 

[BuickGirlFromMars]

I was in the car with the technician, and he tried to shift it with scan tool while driving. And it wouldn't shift.

I know but im saying that is a very big tell tale of an issue and it should be something eh can go off

 

[Jt601]

I was in the car with the technician, and he tried to shift it with scan tool while driving. And it wouldn't shift.

I know but im saying that is a very big tell tale of an issue and it should be something eh can go off

Indeed. Another question. Will a clogged valve body, or solenoid cause this problem

 

[2007LucerneCXL]

Yes and yes.

 

[Jt601]

Yes and yes.

Will they throw a code if there clogged

 

[2007LucerneCXL]

Electronics will more than likely, mechanical would need to trip off some type of sensor.

 

[Jt601]

Electronics will more than likely, mechanical would need to trip off some type of w

Will doing a flush unclog them

 

[Jt601]

Will doing a flush unclog them

Or just change the valve body and solenoids

 

[BuickGirlFromMars]

Will they throw a code if there clogged

they should but it depends on the criteria for the code. But your behavior to me sounds more electrical in nature, which means most likely inside of the transmission(very little electronics left outside in 2006)

 

[BuickGirlFromMars]

Can you do a fluid drain and drop on your pan? see if the TSB for magnets has been done, see if the lube pipes are installed, check for any damage, and also pull accumulator cover off and check the thermo-element

 

[Jt601]

Can you do a fluid drain and drop on your pan? see if the TSB for magnets has been done, see if the lube pipes are installed, check for any damage, and also pull accumulator cover off and check the thermo-element

I dropped the pan and changed the strainer and fluid the other day. The magnet was still in the pan and had what looked like to be clear grease on

 

[BuickGirlFromMars]

I dropped the pan and changed the strainer and fluid the other day. The magnet was still in the pan and had what looked like to be clear grease on

clear? did you clean it off
And did you have a rectangle or a circle
And was there one on your filter?
Any pictures by chance?

 

[Jt601]

clear? did you clean it off
And did you have a rectangle or a circle
And was there one on your filter?
Any pictures by chance?

It was rectangle and no there wasn't one on the filter. And no I didn't take any pictures

 

[2007LucerneCXL]

A good video on what you may be looking at, they cover the problem areas and part failures during disassembly

 

[G-705396]

Had the same symptom on a Chevy truck. It was a failed Transmission Control Module (TCM). There was a code translating to "No communication with TCM."

 

[Jt601]

Had the same symptom on a Chevy truck. It was a failed Transmission Control Module (TCM). There was a code translating to "No communication with TCM."

Had the same symptom on a Chevy truck. It was a failed Transmission Control Module (TCM). There was a code translating to "No communication with TCM."

That's the thing. Mine doesn't have any codes. From what I learned, my tcm is built into my ecm. So my question is, will that not throw a code

 

[BuickGirlFromMars]

That's the thing. Mine doesn't have any codes. From what I learned, my tcm is built into my ecm. So my question is, will that not throw a code

tcm is not built into the PCM