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BodybyFisher

2014 CTS w/AISIN TL-80SN 8-speed

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My son has a 2014 CTS with the AISIN TL-80SN 8-speed transmission, and he has been giving me a hard time about the 8-speed transmission having a clunk and being rough and it seems to search.

I was down to see him in Florida in September and he was unable to replicate the noise, but his complaints continue, he is unhappy. 

Supposedly the dealer replaced his transmission but he STILL has the problem, VERY ODD indeed.

I searched and found that many had complained about the 8 speed clunking and one member said "the original transmission with the clunk has been decommissioned".   I wonder if it is possible for the dealer to have replaced my son's transmission with a tranny that was BEFORE the decommission and the problem persists?

Has anyone heard of this?

Are there any GM service bulletins?

Me being a Cadillac lover, this makes me sick and I have become the lightning rod by my son, because of this.   I NEED to get this fixed. 

My guess is that the dealer replaced this tranny with a unit with the same problem.  My son bought the car used, how can I guarantee that his transmission WAS in fact replaced and that they are NOT stringing him along, not that I don't trust GM, but I have seen the dealers do some shady stuff.

Is a call to the regional rep the way to go?

I loved the car and felt very safe in it in spite of my son driving it aggressively with me in it on Florida 95.

Thanks, Mike


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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Your name looks familiar... Have you been on B4 ???        :hatsoff:

The factory rep can get more done in less time than dealing with the dealership!


THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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36 minutes ago, OldCadTech said:

Your name looks familiar... Have you been on B4 ???        :hatsoff:

The factory rep can get more done in less time than dealing with the dealership!

Thanks @OldCadTech. I need to search here to see if we have any info, but I am sure if you saw anything on this it would ring a bell


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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@BodybyFisher

clunk noise originating from the underside of the vehicle upon acceleration.

 

 

This may be caused by a loss of clamp load at the joint that attaches the propshaft to the transfer case.

 

Correction

If you encounter a vehicle with the above concern, complete the following procedure:

  1. Raise and support the vehicle.
  2. With the vehicle in the air, visually inspect the propeller shaft CV joint to transfer case flange bolts for looseness.
    • If any of the bolts are loose, continue to Step 3.
    • If all the bolts look secure, continue with diagnosis referring to Service Information.
  3. If one or more of the bolts are visually loose, replace all six of the propeller shaft CV joint to transfer case flange bolts.

 

image.thumb.png.966acd9077b8b015f8b5db95a184fac2.png

  • When replacing the bolts, be sure to install and tighten in sequence (1–6) to 40 Nm (29 lb ft) as illustrated above.

 

Parts Information

Description Part Number Qty
RETAINER ASM-PROP SHF FRT 25797834 6
Edited by OldCadTech

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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Thanks @OldCadTech Ill direct my son here hopefully this is the problem and it was overlooked.  Where did you find it?


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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OK back to the drawing board.  It looks like the info you provided is for an AWD vehicle and my son's CTS is rear wheel drive only, so that would preclude the problem being discussed in that link above.  It sounded promising though and I thank you!

I need to pursue the statement that I found on another web site that the 8 speed tranny in question was 'decommissioned'

Ok, seriously back to the drawing board, the 8 speed that was decommissioned was on a 2015 Escalade its the GM 8L90. 

@Logan do you have access to the service bulletins for the 2014 CTS AISIN TL-80SN relating to clunking, seeking/searching?  I have been told that the dealer replaced the tranny.  AISIN is a joint venture between Toyota and Warner (Borg?).  It seems that this tranny is used in the non-V CTS, while the 8L90 is used in the V.

Ill keep searching and see what comes up.  I am getting the dealer receipts from my son, he wants me to go down to feel it for myself and go to the dealer with him. 

Thanks @OldCadTech


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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I do not. My GM DVD ends at 2010. 

I currently use the GM online service info if I really need something. Its $20 for unlimited access for 3 days. Plus it has up-to-date service bulletins. 

 http://www.acdelco.com/for-professionals/gm-service-information.html

As for replacement....I would think if the VIN is still stamped on the trans.....it is the original unit. You may have to look up the location in the service info. There is typically a pad where that gets stamped on. And it should be very clean and precise.... they use a machine to stamp it....and I don't mean with paint. Also....a replacement may be stamped with a service part #. 

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1 hour ago, Logan said:

I do not. My GM DVD ends at 2010. 

I currently use the GM online service info if I really need something. Its $20 for unlimited access for 3 days. Plus it has up-to-date service bulletins. 

 http://www.acdelco.com/for-professionals/gm-service-information.html

As for replacement....I would think if the VIN is still stamped on the trans.....it is the original unit. You may have to look up the location in the service info. There is typically a pad where that gets stamped on. And it should be very clean and precise.... they use a machine to stamp it....and I don't mean with paint. Also....a replacement may be stamped with a service part #. 

Thank you @Logan!  That is terrific info, but especially regarding the GM online service!


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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OoOps, completely missed the part about AWD....

Edited by OldCadTech

THERE IS ALWAYS ENOUGH TIME TO DO THE JOB RIGHT - THERE IS NEVER ENOUGH TIME TO DO THE JOB AGAIN !!!

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6 minutes ago, OldCadTech said:

OoOps, completely missed the part about AWD....

Not at all, I didn't specify either way!  You were right on the problem.   I am going to do the GM online service that @Logan recommended and post what I find.  

I am really interested in what the tranny ID TAG tells me.  


Pre-1995 - DTC codes OBD1  >> http://z-cut.de/US/dtcobd1.html

1996 and newer - DTC codes OBD2 >> http://carprogrammer.com/Z28/PCM/OBD2/On-BoardDiagnosticTroubleCodes(OBD-II).mht

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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