1993 Cadillac Fleetwood shifting

Tiny
HANK2349
  • EXPERT
  • 1993 CADILLAC FLEETWOOD
Transmission problem
1993 Cadillac Fleetwood V8 Front Wheel Drive Automatic 119K miles

This is a 60 Special that had been sitting for a year. Everything worked fine for a week and a half and then several problems popped up. The problem I'm working on now is the transmission stopped down shifting and it has to be manually shifted. It doesn't feel like it goes into first but second works fine and does upshift to 3rd with no problem. I've replaced the modulator but it wasn't the problem. I don't have any codes set for the solenoids or anything else since I've fixed most problems. Do I have to go through the valve body and can I get to the governor with the pan removed.
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Friday, May 14th, 2010 AT 2:43 PM

12 Replies

Tiny
KHLOW2008
  • EXPERT
Hi hank2349,

Thank you for the donation.

What is the model code of the transmission on your vehicle?
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Monday, May 17th, 2010 AT 1:28 PM
Tiny
HANK2349
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This is probably not want you want but it's a 4T60-E. If you need another number let me know where to find it.
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Monday, May 17th, 2010 AT 2:14 PM
Tiny
KHLOW2008
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Yes, this is what I require.

Let us start by understanding the system and proceed with the basics.

SOLENOIDS
Transaxle is shifted up or down by 2 electric solenoids. Both solenoids are located on the valve body. Ignition power is supplied to each solenoid by the cooling fan fuse (most models).

Solenoid "A" controls hydraulic pressure to 1-2 and 3-4 shift valves. Solenoid "B" controls hydraulic pressure to 3-2 down and 4-3 down shift valves.

We shall start by checking if the cooling fan is working and the fuse is good.
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Monday, May 17th, 2010 AT 2:34 PM
Tiny
HANK2349
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I appreciate your quick response. In order to simplify things I was fully certified in'78 and was a line mechanic for several years. I only mention this to let you know that I'm not an inexperienced do your own work kind of person and you don't have to take me by the hand. I could buy a book but I'd rather deal with an experienced mechanic because they already know the ins and outs and some short cuts. PLEASE don't be insulted or take this the wrong way. I've built GM trans. But I wouldn't do one with shift problems because I didn't feel I could do the customer justice, bill wise. I wasn't in it simply for the money. I might be crazy but I'd rather show someone how to do their own work and still do on occasion when someone calls me. But aside from all that crap, both fans come on, something I questioned but really don't care. I started checking all three fuse blocks when these problems showed up and pulled some for systems that I'm not concerned with like the leveling system because it leaks and the drive train takes precedence. If you need the code I assume it's on the trans tag so let me know. I'd like to talk through e-mail but not to ask questions but rather gain some insight from your perspective on why engineers do some of the stupid things they come up with and such. I'm going to keep your profile so I only talk to you, I don't like using different people all the time and I don't mind doubling my donation so I'm e-mailing Ken or Mike or whomever I need to in order to do that. I assume you make more that way. Thanks, Hank. PS I've already learned more than the book I have told me but than it is a Haynes. LOL
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Monday, May 17th, 2010 AT 5:32 PM
Tiny
KHLOW2008
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Hi Hank,

Thank you for the explanation and rest assured that I am not offended. We often have to guess the technical level of the person posting questions so some replies might be a little basic.

I am not a specailist on the transmission in question so it might not be a good idea to put all your eggs in one basket as I do not know if I would be able to assist in getting the problem fixed.

Our site is a forum type so any registered user can reply to the post so do not be surprised. On our side, most of us are too busy with work to want to get into a question that is being handled so if you reply to this post, I would be notified and get back to you once I am online.

Other technicians would only chip in if they have some additional information that might help or if assistance is requested.

We are paid by questions answered so emails are not feasible to me and also the aim of this site is to help as many people as possible and whatever transpired might be of help to others if it is posted here.

I do use emails to send files if they are too large or complicated to be posted here.

I have sent the files for testing the solenoid A and B. Hope they are helpful.
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Tuesday, May 18th, 2010 AT 9:59 AM
Tiny
HANK2349
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Thanks for the reply and I do understand your position and wouldn't jeopardize your ability to get paid. You have the same attitude toward helping others as I do. I simply brought up the e-mail for discussion not to ask questions to help myself, everyone's time is valuable and wouldn't take liberty's with yours or anyone's. I will assume that regardless how the solenoids check out I'll still have to remove the valve body and if I could would rather pay someone else, I hate working on my own vehicles, there's no money in it. LOL I really appreciate your candor and I will stay with you regardless, as you've helped me already. I'll check the solenoids and let you know and thanks a bunch for the files. Hank
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Tuesday, May 18th, 2010 AT 2:42 PM
Tiny
HANK2349
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I'm an idiot, I can't find the files. Hank
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Tuesday, May 18th, 2010 AT 8:05 PM
Tiny
KHLOW2008
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My apologies and please do not blame yourself, it makes me feel bad.

Do you have any other email that I can send the files to?
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Wednesday, May 19th, 2010 AT 7:53 AM
Tiny
HANK2349
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I don't have a clue as to what that's about, att has given me all kinds of trouble since they went with yahoo. Try gkeleher@att. Net that I know works and I get mail at the first address also so who knows. Don't feel bad, although I build my own computers I'm software challenged and can easily overlook something. I do appreciate your dedication. Hank
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Wednesday, May 19th, 2010 AT 11:19 AM
Tiny
KHLOW2008
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I have resent the files to you new email. Hope they get through correctly.
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Wednesday, May 19th, 2010 AT 1:03 PM
Tiny
HANK2349
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KH, I can't believe what I saw in the files you sent. When I looked at them something jumped out at me that I don't have in the info I have and accounts for the four systems that went down at the same time, the PCM. The cruise control, the transmission and the spark/timing along with the A/C climate controls all went down. What are the odds on having four systems go down at the same time for four different reasons? I had to replace the blower control module and replaced the BCM because I got it cheap. The fan ran ALL the time unless I pulled the 20 amp fuse for it. It would appear that I need to double check the power at the PCM even if the fuses are good and check the output to each system. I feel fairly confident the PCM is the problem. I'll let you know what happens and thanks so much for your persistence and patience. Hank
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Thursday, May 20th, 2010 AT 12:50 AM
Tiny
KHLOW2008
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The chances of four components failing at the same time due to indivudual faults would be as good as striking the jackpot.

Yes, I would say there would most likely be a common cause.

When we start something, we would not stop until the problem is resolved or when we have run out of resources.

Have a nice day and good luck on the diagnostics.
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Thursday, May 20th, 2010 AT 7:27 AM

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