car doesn't switch to 3rd gear
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
Results 1 to 7 of 7
HT4100 4.1, 4.5, 4.9 Discussion, car doesn't switch to 3rd gear in Cadillac Engine Technical Discussion; HI my '88 Fleetwood doesn't switch to 3rd gear. I had problems with rough engine as I posted in another ...
  1. #1
    Romy is offline Cadillac Owners Member
    Automobile(s): 1988 Fleetwood D'Elegance
    Join Date
    Jul 2007
    Location
    Switzerland
    Age
    39
    Posts
    52

    car doesn't switch to 3rd gear

    HI

    my '88 Fleetwood doesn't switch to 3rd gear. I had problems with rough engine as I posted in another thread. But his problem is solved now. Engine runs smooth. Now all of a sudden it doesn't switch to 3rd gear. We adjusted the TPS after changing plugs and wires. Does this has somthing to do with this switching problem? Thanks for any help.
    romy

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    madmike69's Avatar
    madmike69 is offline Cadillac Owners Member
    Automobile(s): ´88 Fleetwood Brougham de Elegance, ´88 Sedan De Ville
    Join Date
    Jul 2007
    Location
    Hamburg, Germany
    Age
    41
    Posts
    90

    Re: car doesn't switch to 3rd gear

    Hi,

    - do you have any trouble codes?
    - did you check the wires, going into the trans, which control the gear shift solenoids (or "servos" in german)

  4. #3
    Romy is offline Cadillac Owners Member
    Automobile(s): 1988 Fleetwood D'Elegance
    Join Date
    Jul 2007
    Location
    Switzerland
    Age
    39
    Posts
    52

    Re: car doesn't switch to 3rd gear

    no codes. But I will check the wires.

  5. #4
    Romy is offline Cadillac Owners Member
    Automobile(s): 1988 Fleetwood D'Elegance
    Join Date
    Jul 2007
    Location
    Switzerland
    Age
    39
    Posts
    52

    Re: car doesn't switch to 3rd gear

    Well, checked the wires and cleaned the contacts in the brake switch. They were dirty. After that checked the voltage on the wires that go to transmission. Got 10 V and 0 V when brake pedal is pressed and not. It seems that the wires are ok and the transmission gets the 10V to switch BUT it doesn't! Still no codes...
    Will check the wires from trans to ECM tomorrow. Will also replace ECM to ckeck if ECM may be bad.

  6. #5
    madmike69's Avatar
    madmike69 is offline Cadillac Owners Member
    Automobile(s): ´88 Fleetwood Brougham de Elegance, ´88 Sedan De Ville
    Join Date
    Jul 2007
    Location
    Hamburg, Germany
    Age
    41
    Posts
    90

    Re: car doesn't switch to 3rd gear

    Hi Romy,

    Will check the wires from trans to ECM tomorrow. Will also replace ECM to ckeck if ECM may be bad.

    You should do that. I guess this will make claer, if you have an ECM Problem (still no codes...)
    which would be cheaper or if you have a "hardware" Problem with the trans...
    Actually i don´t know if there´s access to the shifting solenoids / servos without removing
    the complete transmission unit. Just got my service manual today...

  7. #6
    Romy is offline Cadillac Owners Member
    Automobile(s): 1988 Fleetwood D'Elegance
    Join Date
    Jul 2007
    Location
    Switzerland
    Age
    39
    Posts
    52

    Re: car doesn't switch to 3rd gear

    I got a spare ECM. So I can check this without buying one. But I really hope that there won't be anything wrong with the transmission. I will come back later.

  8. #7
    Romy is offline Cadillac Owners Member
    Automobile(s): 1988 Fleetwood D'Elegance
    Join Date
    Jul 2007
    Location
    Switzerland
    Age
    39
    Posts
    52

    Re: car doesn't switch to 3rd gear

    replaced ECM and engine works better than before. But it still doesn't switch. It happend once but then again not. Don't know if solenoid works right.

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