2004 Deville Trouble Code P2763

[bigkickr]

I have a 2004 Cadillac Deville, I just turned 75,000 miles this week.

I had trouble code P2763 pop up over Thanksgiving. Rough shifting, reduced fuel mileage, etc. I have read a couple of threads about this code. I'm am looking for some feedback from others who have had this code and have had it repaired. I'm curious as to the labor time and costs involved. I spoke to a trans guy over the phone who told me that the entire trans needs to be rebuilt ($1,800 - $2,300), where as I have read that the TCC (Torque Converter Clutch) Solenoid is bad and "simply" needs to be replaced ($38.00 for the solenoid, $38.00 for new screens, gaskets, etc., plus labor time).

If you have had experience with this code and repair I'd love to hear what the actual diagnosis, cost, and down time of the vehicle were.

Thanks,

Nate

[JimD]

You got the standard transmission shop response.

That solenoid can be replaced without removing the powertrain cradle (or rebuilding the transmission). It's simple enough to say and a little more difficult to do; but the "easy" way is to replace the cradle mounting bolts with threaded rods and drop & tilt the powertrain far enough to access the transmission left side cover plate.

There is a remote possibilty the external wiring could be damaged. Inspect the large round (20 pin) connector that is buried under the engine intake air plumbing.

Bodybyfisher has done this job and I will alert him to your thread.

[bigkickr]

You got the standard transmission shop response.

That solenoid can be replaced without removing the powertrain cradle (or rebuilding the transmission). It's simple enough to say and a little more difficult to do; but the "easy" way is to replace the cradle mounting bolts with threaded rods and drop & tilt the powertrain far enough to access the transmission left side cover plate.

There is a remote possibilty the external wiring could be damaged. Inspect the large round (20 pin) connector that is buried under the engine intake air plumbing.

Bodybyfisher has done this job and I will alert him to your thread.

Thanks Jim. I don't have the technical knowledge or time to do this repair myself, but as I'm sure most people will agree knowledge is power and I'd like to be as educated about this as I can before I open up my wallet.

Thanks Again! Looking forward to some more feedback.

-Nate-

[BodybyFisher]

P2763 - Short to voltage in the TCC Solenoid

A short to voltage should be easy to detect, I would hope that they tested the TCC through the tranny connector

The engine carriage can be tilted to access the side pan

The TCC solenoid can be accessed through the plug via pins T and U, resistance at 20 degrees C should be 15 to 20 ohms, and at 80 degrees C it should be 11 to 25 ohms.

The TCC solenoid to case resistance should be Less than 250 k ohm

Here is a diagram of the plug to see pins T and U

Those electrical tests SHOULD be performed before replacing the TCC solenoid

You may be able to find a good tranny shop to replace just the TCC solenoid by tilting the carriage, while they are there, they could also replace the pressure solenoid and the ISS speed sensor.

[bigkickr]

P2763 - Short to voltage in the TCC Solenoid

A short to voltage should be easy to detect, I would hope that they tested the TCC through the tranny connector

The engine carriage can be tilted to access the side pan

The TCC solenoid can be accessed through the plug via pins T and U, resistance at 20 degrees C should be 15 to 20 ohms, and at 80 degrees C it should be 11 to 25 ohms.

The TCC solenoid to case resistance should be Less than 250 k ohm

Here is a diagram of the plug to see pins T and U

Those electrical tests SHOULD be performed before replacing the TCC solenoid

You may be able to find a good tranny shop to replace just the TCC solenoid by tilting the carriage, while they are there, they could also replace the pressure solenoid and the ISS speed sensor.

Thanks a bunch, I haven't had anything done to it other than have the code diagnosed. I'm assuming that testing the TCC through the tranny connector should be a relatively easy thing to do for a mechanic once the vehicle is in the air? What results (or lack there of) should the mechanic be looking for? Based on what he finds what are possible courses of action? I really can't imagine that the trans needs to be rebuilt. The car has run fine since I've owned it. I don't know enough to know how these thing happen or break down, but I'd have to assume that if a trans is bad enough to a point where it would have to be completely overhauled and rebuilt there would be some warning signs ahead of time?????

Thanks again for your input!

-Nate-

[BodybyFisher]

Yes, on a lift testing at the connector is easy

Well, if the TCC solenoid is shorted, the resistance reading will be out of range

It is important to carefully test the TCC solenoid before ripping the tranny apart, as the problem could be the TCC (torque converter) or converter seals within the tranny, but the fact that it is shorted, there should be an obvious problem with the TCC or wiring

My guess is that on the highway your RPMs are high as the TCC is not kicking in

This is an advanced job, not for an average DIYer, I sweated the entire job, its quite difficult

[bigkickr]

Yes, on a lift testing at the connector is easy

Well, if the TCC solenoid is shorted, the resistance reading will be out of range

It is important to carefully test the TCC solenoid before ripping the tranny apart, as the problem could be the TCC (torque converter) or converter seals within the tranny, but the fact that it is shorted, there should be an obvious problem with the TCC or wiring

My guess is that on the highway your RPMs are high as the TCC is not kicking in

This is an advanced job, not for an average DIYer, I sweated the entire job, its quite difficult

I wouldn't be lucky enough for you to live in the Southeastern Michigan area would I? If you've done this and are willing to do it again I'd prefer to bring it to you if your in the area.

Thanks,

Nate

[BodybyFisher]

Sorry Nate, I am in New York. Check around for mechanics, that will do this, dealers and tranny shops are looking to replace or rebuild the entire component, its not cost effective for them to actually fix it.

Look for a good mechanic, not easy to find. I will help in any way possible with diagrams and diagnostics, put the mechanic in touch with this board.

I have a 4T80E rebuilding manual that has lots of info in it.

[bigkickr]

Sorry Nate, I am in New York. Check around for mechanics, that will do this, dealers and tranny shops are looking to replace or rebuild the entire component, its not cost effective for them to actually fix it.

Look for a good mechanic, not easy to find. I will help in any way possible with diagrams and diagnostics, put the mechanic in touch with this board.

I have a 4T80E rebuilding manual that has lots of info in it.

One last question, when you did this job, did changing the solenoid fix the problem, or did other things need to be replaced? I've spoken to a couple people in my area today and a couple are telling me they need to replace the torque converter and some other parts as well. Was this the case for you, or did changing the solenoid correct the problem?

[BodybyFisher]

Sorry Nate, I am in New York. Check around for mechanics, that will do this, dealers and tranny shops are looking to replace or rebuild the entire component, its not cost effective for them to actually fix it.TC

Look for a good mechanic, not easy to find. I will help in any way possible with diagrams and diagnostics, put the mechanic in touch with this board.

I have a 4T80E rebuilding manual that has lots of info in it.

One last question, when you did this job, did changing the solenoid fix the problem, or did other things need to be replaced? I've spoken to a couple people in my area today and a couple are telling me they need to replace the torque converter and some other parts as well. Was this the case for you, or did changing the solenoid correct the problem?

I actually did not have this problem. I had the ISS speed sensor problem. While I was doing the ISS, I changed TCC solenoid.

You appear to be having an electrical problem, because of the code that says its SHORTED, its either the solenoid that has become defective from heat (coil windings) or the wiring.

Because of the SHORTED code, its not likely your torque converter