Transmission Failure Diagnosis
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Page 1 of 3 1 2 3 LastLast
Results 1 to 15 of 33
2009-2014 Cadillac CTS-V Performance Mods Discussion, Transmission Failure Diagnosis in Cadillac CTS-V Series Forum - 2009-2014; Last week my transmission failed. Got a new one today and picked up the car. So i'm going to baby ...
  1. #1
    jwa999 is offline Cadillac Owners Fanatic
    Automobile(s): CTS-V 2009 White Diamond, 996TT Silver, G35 Coupe 6mt, M45S
    Join Date
    Jan 2009
    Location
    DFW, Texas
    Age
    56
    Posts
    413

    Transmission Failure Diagnosis

    Last week my transmission failed. Got a new one today and picked up the car. So i'm going to baby it for a while.

    For anybody interested, this is the report:

    "6187 Transmission trying to tie up when commanding 5th and 6th gear. Removed trans and found 1-2-3-4 and 4-5-6 clutches burnt. K7000 6.20 air checked housings, checked necessary pistons, disassembled valve body and inspected valves. Was unable to find problem explaining why clutches burnt. Called techical assistance and they suggested resealing effected drums and replace burnt clutches, upper and lower valve bodies, and TCM assembly. Called P.Q.C. to get authorization for TCM assembly. After talking with engineer for a few minutes, he declined TCM assembly and wanted to replace trans assembly due to milage and no definite as to why clutches burnt. Placed trans assembly per P.Q.C., flushed cooler, topped off with fluid and test drove. Programmed TCM. Flush code 3BFBE07 .8 GPM @ 79 DEG. G.M. CASE # 10879872"

    New transmission costs around $2500. (total was $3400, but included car rental and their work). Warranty payed for it of course. (New transmission is cheaper than a clutch job on the porsche!)

    On delivery of the vehicle, left front (polished) wheel got scratched up. So it will have to go back again, but 'ill wait till next week!

    Hans.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    neuronbob's Avatar
    neuronbob is offline Cadillac Owners Connoisseur
    Automobile(s): 2013 6MT V wagon, OBM, 2009 silver V sedan (traded)
    Join Date
    Dec 2007
    Location
    Cleveland area, OH
    Age
    46
    Posts
    4,258

    Re: Transmission Failure Diagnosis

    So they don't know why the clutches burned out. Sounds a little worrying to me. I wonder whether it was simply poor assembly given the relatively early failure.

  4. #3
    jwa999 is offline Cadillac Owners Fanatic
    Automobile(s): CTS-V 2009 White Diamond, 996TT Silver, G35 Coupe 6mt, M45S
    Join Date
    Jan 2009
    Location
    DFW, Texas
    Age
    56
    Posts
    413
    Thread Starter

    Re: Transmission Failure Diagnosis

    Or somebody beat the hell out of it during test drives. It was one of the first Vs at that dealership, it has 134 miles on it when i bought it. It failed at 6100 miles.

  5. #4
    CVP33's Avatar
    CVP33 is offline Cadillac Owners Master
    Automobile(s): '04V, '05V, '06SRT8, '10V sedan, '13ZL1 vert, '12 V coupe
    Join Date
    Feb 2004
    Location
    mockingbigjimsville, NC
    Age
    48
    Posts
    5,910

    Re: Transmission Failure Diagnosis

    Beat the hell out of an automatic transmission?

  6. #5
    neuronbob's Avatar
    neuronbob is offline Cadillac Owners Connoisseur
    Automobile(s): 2013 6MT V wagon, OBM, 2009 silver V sedan (traded)
    Join Date
    Dec 2007
    Location
    Cleveland area, OH
    Age
    46
    Posts
    4,258

    Re: Transmission Failure Diagnosis

    I don't think it's that hard to abuse even an automatic tranny. People do all sorts of bad things during test drives.

  7. #6
    musclesbmf is offline Cadillac Owners Connoisseur
    Automobile(s): 2011 GTR
    Join Date
    Jan 2009
    Location
    Tampa, FL
    Age
    42
    Posts
    1,026

    Re: Transmission Failure Diagnosis

    What were the symptoms you were experiencing?

    thanks,
    Mark

  8. #7
    CIWS's Avatar
    CIWS is offline Cadillac Owners 10000+ Posts
    Automobile(s): 2013 BMUU X1 35i Sport, 2006 STS-V--2005 CTS-V ( traded in)
    Join Date
    Dec 2005
    Location
    D/FW Tejas
    Posts
    25,456

    Re: Transmission Failure Diagnosis

    Glad to see you have your V back Hans.

    It will be interesting to see if your case is a fluke or a trend.

  9. #8
    jwa999 is offline Cadillac Owners Fanatic
    Automobile(s): CTS-V 2009 White Diamond, 996TT Silver, G35 Coupe 6mt, M45S
    Join Date
    Jan 2009
    Location
    DFW, Texas
    Age
    56
    Posts
    413
    Thread Starter

    Re: Transmission Failure Diagnosis

    Quote Originally Posted by musclesbmf View Post
    What were the symptoms you were experiencing?

    thanks,
    Mark
    Transmission completely locked up going to 5th gear. That's why the clutches where burned. Car would start to slow down fast when it hit fifth gear.
    Just got it back and the trans temps where around 150. The morning I brought it in, driving slowly, the trans temps where already 180.
    I had about 2000 miles of performance max tune on it. Don't think that was the cause. Restored to stock before i brought it in and they never questioned it. Of course I'm now questioning if I should reapply the tune...

    Hans.

  10. #9
    McRat is offline Cadillac Owners Member
    Automobile(s): 2009 CTS-V
    Join Date
    Jun 2009
    Age
    54
    Posts
    26

    Re: Transmission Failure Diagnosis

    Quote Originally Posted by jwa999 View Post
    Transmission completely locked up going to 5th gear. That's why the clutches where burned. Car would start to slow down fast when it hit fifth gear.
    Just got it back and the trans temps where around 150. The morning I brought it in, driving slowly, the trans temps where already 180.
    I had about 2000 miles of performance max tune on it. Don't think that was the cause. Restored to stock before i brought it in and they never questioned it. Of course I'm now questioning if I should reapply the tune...

    Hans.
    What I do know,

    With the programmable Allison Automatic, both ECM and TCM programming has been responsible for "tie-ups" which toast the clutches and even damage hard parts. Not all programming, just some programming. There are racers who would trash transmissions after just 3 quarter mile passes with too aggressive of tuning.

    Does this apply to the 6L90? Can't say. But you cannot accelerate between gears, nor accelerate during a tieup. Tie ups often feel like a "bang" on a shift at high throttle settings. Kinda like shifting a motorcycle without the clutch. IMO, the fastest automatic ET's we ran had shifts that you barely feel, just the rpm falls, which means there is still some shift defueling occuring. Bang shifting felt faster, but it wasn't.

    This might not apply, and I'm not saying ECM/TCM tuning is bad either. But at least on some GM automatics, tuning can indeed cause premature failure.

  11. #10
    neuronbob's Avatar
    neuronbob is offline Cadillac Owners Connoisseur
    Automobile(s): 2013 6MT V wagon, OBM, 2009 silver V sedan (traded)
    Join Date
    Dec 2007
    Location
    Cleveland area, OH
    Age
    46
    Posts
    4,258

    Re: Transmission Failure Diagnosis

    ^^^^^
    So should I not use the w4m tranny tune? I don't think its THAT aggressive a tune? Haven't put it on yet.

  12. #11
    McRat is offline Cadillac Owners Member
    Automobile(s): 2009 CTS-V
    Join Date
    Jun 2009
    Age
    54
    Posts
    26

    Re: Transmission Failure Diagnosis

    Quote Originally Posted by anonfrank View Post
    ^^^^^
    So should I not use the w4m tranny tune? I don't think its THAT aggressive a tune? Haven't put it on yet.
    Naw, all I'm saying is that with another GM trans (Allison) that SOME tuning changes can bust the trans in very short order, and has happened quite a bit. Other tuning actually helps the trans survive high output. We run huge amounts of power through the Allison though. 1500+ ft/lb, 800+ rwhp. Tie-ups are lethal.

    Could the same thing happen with 6L90 at far lower power increases? I cannot say. Time will tell though. Allisons are much different internally, and not all autos can tie up. Guess I have to do some 6L90 research.

  13. #12
    wait4me's Avatar
    wait4me is online now Cadillac Owners Connoisseur
    Automobile(s): 11v,2 09 v's,2 05 v's,5 GTM supercars,viper,volt,2012 karma
    Join Date
    Jan 2009
    Location
    warsaw indiana
    Posts
    2,998

    Re: Transmission Failure Diagnosis

    There are NO changes made for 5th and 6th gear in my tunes. Those to me are not considered a PERFORMANCE gear so i leave all that stock. All changes are in 1- 4th. That is where all the performance gains are to be had anyways.

  14. #13
    wait4me's Avatar
    wait4me is online now Cadillac Owners Connoisseur
    Automobile(s): 11v,2 09 v's,2 05 v's,5 GTM supercars,viper,volt,2012 karma
    Join Date
    Jan 2009
    Location
    warsaw indiana
    Posts
    2,998

    Re: Transmission Failure Diagnosis

    Quote Originally Posted by anonfrank View Post
    ^^^^^
    So should I not use the w4m tranny tune? I don't think its THAT aggressive a tune? Haven't put it on yet.

    My trans tunes arent agressive. Anyone asking for an agressive tune or to take out torque managment, i tell them no and that it will damage the trans..

    You can also damage the trans by asking for too fast of a shift, and also to much line pressure.

    This isnt new technology, It is a trans type used since 2005... I have cars running 60,000 miles plus in the STSv with the WEAKER transmission.....

  15. #14
    neuronbob's Avatar
    neuronbob is offline Cadillac Owners Connoisseur
    Automobile(s): 2013 6MT V wagon, OBM, 2009 silver V sedan (traded)
    Join Date
    Dec 2007
    Location
    Cleveland area, OH
    Age
    46
    Posts
    4,258

    Re: Transmission Failure Diagnosis

    I'm cool then. Thanks for answering as I know precisely nothing about tranny programming.

  16. #15
    jwa999 is offline Cadillac Owners Fanatic
    Automobile(s): CTS-V 2009 White Diamond, 996TT Silver, G35 Coupe 6mt, M45S
    Join Date
    Jan 2009
    Location
    DFW, Texas
    Age
    56
    Posts
    413
    Thread Starter

    Re: Transmission Failure Diagnosis

    It really feels like a one off failure. I'm an aggressive driver, had the car upto 140 a couple of times. Never on a drag strip. Will launch from a stoplight trying to avoid wheel slip. Fooled around a little bit with brake launching, but not much. Just a little revving to 1000rmp before letting go of the brake already launches the car great. The failure occurred less than 2 minutes after I started it and drove away from my office sunday before last. I had driven it a few hours earlier. I remember it revving higher then usual in the second corner and the next moment it failed.
    The transmission always operated very smoothly with the tune, never any problems.

    Hans.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting