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97 Seville transmission noise


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Hi all. I wanted to wait a little before posting more unfortunate news. When I started driving my seville after the engine work this year I started hearing a noise coming from the driver side engine compartment. I first heard it at my bank and thought maybe it was another car, but it wasnt. It was mine.

It only does it in park

changes with different RPMs,

is easier to hear at idle but does it faster at higher idle

sounds like it is coming from the transmission at the front near the water pump.

I actually thought it was the water pump tensioner and replaced it. It was bad but not the problem.

So I took it back to my Dealer(the one that did the engine work) and several people listened to it and had no answer, the cadillac tech said drain it, add trans x and sell it. How professional considering I just spent nearly 4000 foor them to redo the engine. Needless to say I wasnt satisfied and took my business elsewhere.

The noise is so hard to describe. I really need a sound clip. Kind of sounds like a bearing of some sort, but have no idea what it could be, nor have I ever heard the noise before.

The fluid is pink, no shifting issues at all. very slight TCC slippage. No light, no codes.

I will try to post a sound clip tomorrow. It always does it no matter what, as long as it is in park. Maybe one in a million it might be something easier to figure out

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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When I did the Input Speed Sensor in my 96, I had to take the side pan off. On each sprocket there is a flat thrust bearing that fell out at some point when I took the side cover off and I didnt know which side faced out. There were two of them, I should have replaced them, but I didn't, and I kicked myself for not doing so when I had the chance. When I reinstalled them, I was unsure what side faced out. Facing the wrong side out, would cause the bearing to run in the opposite direction, then it had run up till that point and they may have worn a certain way.

Has your side pan been removed?, if so where the thrust bearings replaced?

After reassembly, I had a slight whine / weird noise from one of those bearings. I might add that one of the bearings was blue from heat, and yet, I still did not replace it (dumb mistake). I think if the fluid leve gets low, it can expose the higher bearing and it will overheat.

It made noise till the day I got rid if it, but I had no problems. Not sure if this is your problem, but it may be

Here is a drawing of the area, the thrust bearings are 132 and 440

ThrustBearings.gif

Here is a photo of my sprocket

ISSSpeedSensorJob039.jpg

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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wow, what a great picture. A far as I know there has never been any trans issues. The only thing was it was garage parked for a few years before I bought it due to the engine. That sprocket in the left of the photo looks like it might be located just under the water pump area in the trans. If that is the problem what kind of job am I looking at.

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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wow, what a great picture. A far as I know there has never been any trans issues. The only thing was it was garage parked for a few years before I bought it due to the engine. That sprocket in the left of the photo looks like it might be located just under the water pump area in the trans. If that is the problem what kind of job am I looking at.

If you don't mind tilting the engine carriage, its an advanced job, from the jobs you have done, you could do it. Plus, along the way you can have fun replacing various sensors, solenoids, seals, etc. Its a physically challenging job but then again, i am 58 and mostly anything is getting physically challenging these days, and yet beginning Thursday I am running a basketball camp for 3rd grade girls, illustrating the fundamentals, hopefully, i can still illustrate them.

I can help you with this job, having done it, its an intreging job and you can inspect lots of stuff. This is a job you only do if you are going to love and cherish that car for the long haul which based on the engine job, you are. I have lots of photos and illustrations and you can learn from my slips. There is a thread on P0717 that is a good read in How To

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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do you have to remove the valve body to access the sprockets?

I need to change my TCC solenoid anyhow so I would do that.

I have replaced 2 transissions on Devilles, not fun but this should be easier because I dont actually have to remove the transmission, just remove the side pan.

Below is a video of the sound. It is hard to hear over the elevated idle but once I put it in gear then back in park it is more noticeable.

I tried my best. The noise can be best heard from inside the wheelwell so thats where I did it

th_100_2299.jpg

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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I would be absolutely certain the noise is from the trans. before ripping into it. Maybe have another dealer look at it? Do you have a piece of 3/8" hose you can use as a stethoscope?

Kevin
'93 Fleetwood Brougham
'05 Deville
'04 Deville
2013 Silverado Z71

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Ill post pics later but KHE is correct diagnose this carefully.

And yes, when I did this job I replaced my ISS speed sensor, TCC solenoid and the Pressure solenoid.

I should also have replaced the electrical connector, while I was there, it leaked from there through the wires.

Pre-1995 - DTC codes OBD1  >>

1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/

Cadillac History & Specifications Year by Year  http://www.motorera.com/cadillac/index.htm

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well I am assuming it is ok to drive as I have alreay put 2000 miles on it with no loss of power or change in the noise. I hope to be able to hold off til next year as my pot of gold has run dry

GM FAN FOREVER

Nice, clean, luxury= fine automobile

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