Hard shifting and ECC not working

Tiny
THEROEFAMILY
  • MEMBER
  • 1985 CADILLAC SEVILLE
  • 4.1L
  • V8
  • 2WD
  • 86,143 MILES
Okay, I was in the process of running test and I took off the sensor on top of transmission pan and cleaned it good and let it dry then plugged it back in. I then drove it and it would shift but it was shifting way too late; it's almost like making it shift when it does it shifts hard! But the other gears shift easy expect overdrive. I haven't gotten a chance to go that fast for long enough now my ECC is completely out and the mileage info. Any ideas on where to start? I checked the fuses are all good. Thanks so much.
Monday, July 13th, 2020 AT 3:28 PM

7 Replies

Tiny
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Was this doing the same thing before you cleaned the sensor or did the issue change when you cleaned it?

Just based on this info I would think the throttle valve is the issue causing a potential pressure issue. Depending on what we find with the line pressure and if this issue was changed, we can go in different directions.

I attached some info for your review and let me know about this info and we can go from there.
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Monday, July 13th, 2020 AT 7:26 PM
Tiny
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Before I cleaned the sensor and changed the transmission filter it wouldn't shift at all. Now it's hard shifting out of first and and I have no power to the ECC display no of it works at all checked fuses wiring nothing jumped out expect may a small bulb and I replaced it and still no power. I understand what you were saying in the first pic the diagram. However was hard for me to get. Thanks do much.
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Tuesday, July 14th, 2020 AT 10:40 AM
Tiny
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With that info, what was the condition of the fluid when you changed the filter? I suspect you are going to need an overhaul of the transmission due to it not shifting and now it is better. However, hard shifting indicates internal clutch/fluid issues, or control issues.

This is why we need to know the condition of the fluid. Was it dark and smell burnt?
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Tuesday, July 14th, 2020 AT 7:36 PM
Tiny
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It was dark but It just smelled like old transmission fluid. I didn't drive a lit today but what little I did it seemed to shift easier but still hard and now the ECC is out and it wont crank half the time after it sets for a while it seems to help if I move the steering wheel up and down but am not sure if that has anything to do with it. When I turn it over I either get nothing or it just make like a clunk sound like it's no got enough power to crank.
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Tuesday, July 14th, 2020 AT 10:11 PM
Tiny
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Okay. We need to start a new post with the no start issue because we need to keep each post to one issue. I suspect the no start is related to the steering moving up and down but it is not related to the trans issue which is why we need to start a new post to handle that issue. Clearly if that issue is preventing us from driving it then we need to solve that one and then come back to the shifting.

However, I still think are going to need to overhaul the unit just based on the fact that the fluid made a difference.

Let me know if I am misunderstanding something but if not, let's start a new post on the starting issue and go from there.
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Wednesday, July 15th, 2020 AT 5:24 PM
Tiny
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Okay, I am sorry. Okay, the starting issue is the worst atm I think when I go to leave most of the time it takes 3 to 5 tries to get it to turn all he way over and start when it does not start I get like a click sound but that's it not clicking almost like a clunk kind of how it is if your battery is dead and it don't have enough power to crank. On a bad day it could take 10 to 15 tries and moving the steering wheel seems to help sometimes usually after it runs for a while. I don't have the issue the rest of the day until the next morning after it has set for a while. Thanks so much for your help and patience with me.
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Thursday, July 16th, 2020 AT 4:59 AM
Tiny
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That sounds like the starter is failing. That is pretty typical of when it starts to fail.

Here is a guide that talks about this. Check this out and then start a new post with what you find as we need to keep this one about the shifting issue. Clearly the starting would take precedence so let's tackle that one first.

https://www.2carpros.com/articles/starter-not-working-repair

Here is a link to get the new post started. Thanks

https://www.2carpros.com/questions/new
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Thursday, July 16th, 2020 AT 5:14 PM

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