Transmission help
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 4 of 4
Northstar Engines and System Technical Discussion Discussion, Transmission help in Cadillac Engine Technical Discussion; Hey, here's something rather fun that happened today. I have a 01 deville northstar 4t80. Had a 1860 tcc open ...
  1. #1
    lovcads's Avatar
    lovcads is offline Cadillac Owners Member
    Automobile(s): 2001 northstar engine only,lookin for a car to plug it into
    Join Date
    Jan 2005
    Location
    ontario
    Posts
    17

    Transmission help

    Hey, here's something rather fun that happened today. I have a 01 deville northstar 4t80. Had a 1860 tcc open or short. so today I replaced that tcc solenoid and the pc solenoid while I was in there. Went well, was working great, no codes good lock up. I'm on the highway in 4th and lock up, then it redlines. coast over to the side of the road. Not making any bad noises, no reverse or any forward- in drive or any manual gears.Could it be a broken oil pump shaft? Does that sound like my problem? or is it used tranny time? the level is low I notice but..
    thanks for any tips!

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    lovcads's Avatar
    lovcads is offline Cadillac Owners Member
    Automobile(s): 2001 northstar engine only,lookin for a car to plug it into
    Join Date
    Jan 2005
    Location
    ontario
    Posts
    17

    Re: Transmission help

    the fluid was only down a quart, still nothing

  4. #3
    Krashed989's Avatar
    Krashed989 is offline Cadillac Owners Connoisseur
    Automobile(s): 94 Eldorado, and a 99 ETC
    Join Date
    Sep 2004
    Location
    Hilo, Hawaii
    Age
    26
    Posts
    3,887

    Re: Transmission help

    Get the car towed home or to a garage and drop the pan. That's the only way to tell if there is severe damage or not. Also disconnect the top transmission cooler line and see if there's flow out of it with the engine running. If the pump is working and there aren't any clogs, there should be flow. If the damage isn't bad, you may have to go back in and retrace your steps. Maybe you mixed up a couple check balls or something.

  5. #4
    lovcads's Avatar
    lovcads is offline Cadillac Owners Member
    Automobile(s): 2001 northstar engine only,lookin for a car to plug it into
    Join Date
    Jan 2005
    Location
    ontario
    Posts
    17

    Re: Transmission help

    I found the problem...
    There is a bracket on the side cover of the trans, for one of the mounts. It is held in by three m8 bolts and one stud. The stud LOOKS like it should go in one way because it is too long the other way to even get a deep socket on. So, I put the bolt in the wrong way first, then flipped it around when I realized that it was too short to put the mount bracket back on. By putting the bolt in the wrong way it broke off chunks of aluminum off the backside on the case. The pump picked up one of the chunks, locked and broke the pump shaft. Initially, I had no idea why the pump shaft broke but when I went to another gm dealer to talk to a couple of my trans buddies, they knew exactly what I did. "ha, almost everyone has done that once".
    I removed the upper valve bodies, both pumps and channel plates apart and cleaned all the $hit out. Dropped the pan and cleaned it too. Has been fine since.
    I admit I f'd up big time, learn from my mistake please.

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