Question about 1994 Cadillac DeVille

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1999 Cadillac Deville Transmission rattling

Hi, I have a 99 deville with a 4.9 engine, it runs smooth and shifts fine. But when put in park, neutral, and reverse it makes a loud knocking/rattling noise and it sounds like something was dropped in the tranny. Please help.

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Could be tranny mounts, or it could be your differential going bad. Also, if you have a 4.9 instead of the 4.6 Northstar then there has been an engine swap, and you could be experiencing ATM or ECM problems.

Posted on Jan 09, 2013

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Have ypu checked the fluid level in it? if the fluid level is good, you might want to replace the fluids in it

Posted on Jun 02, 2009

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1 Answer

Have a 99 cadillac deville that will shift fine when you first take off but after you stop will not shift pass second gear. If you stop completely and put it in park it will shift through all the gears...


The powertrain control module (PCM) doesn't like the information it is getting from the ignition control module (ICM), and the PCM controls shifting, traction control, etc.If these are the only codes you are getting and the car moves, then you could assume the sensors connected to the ICM are working properly. That leaves why the PCM thinks there is a problem. I would certainly replace the ICM first, and then if the problem still exists, the PCM.

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Have a 1990 cadillac deville engine runs smooth in park/,neutral when iput in gear and accelerate it shutters changed plugs / wires no help could it be tranny or cv joint no noises from either


Does idle rough in gear if so may have bad fuel injectors. not saying that it is not transmission or joints, need to make sure the engine is running properly first.

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How do check transmission fluid level in a 99 durango correctly ?


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Transmission


If the fluid level is ok then you need the transmission repaired/rebuilt.

Jan 10, 2014 | 2000 Cadillac DeVille

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I am about to buy a 1997 Cadillac deville concours with 82k miles on it. The car seems to be in good condition. What should bear in mind before buying it. What should I check?? Is 4800$ a reasonable price...


$4800 is what Kelley Blue Book is suggesting private party in good condition.
First thing give it a good external look for any signs of accidents, such as dents or slightly different paint colors as there can be hidden damage in the suspension, frame or body.
Next start the vehicle and listen to how it runs. It should sound smooth with no rattling or ticking or other weird noises.
Also check to see if the check engine light is on or any other warning lights.
With the vehicle running, shift through all the gears twice and check transmission fluid with vehicle in neutral (parking brake on). Shut the vehicle off and check the oil.
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These steps and common sense will give you a pretty good indication of the condition of the vehicle.

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1994 Cadillac Deville Transmission rattleing


parking pall in the transmission is worn or broken, take to transmission shop, common problem should not be too expensive. please rate my fix as i strive to be the best, if you need more help get back to me

Apr 30, 2009 | 1994 Cadillac DeVille

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Neutral switch 1993 cadillac


The neutral safety switch is on the top of the automatic transaxle (under the hood). You have to remove the air cleaner assembly for access to this item. Once the air cleaner is off, you can see the switch mounted on top of the transaxle.
Remove the shift linkage, electrical connectors and vacuum hose as needed.
Remove fuel line bracket if needed.
Remove mounting bolts and nuts to remove the old switch.

Install new switch as reverse of above.
Put shift lever in neutral.
Align switch so it's alignment hole and the matching tang hole line up. Tighten down the switch mounting bolts. Verify that the engine starts in PARK and NEUTRAL. Re-adjust if it doesn't.
Charlie

Jul 10, 2008 | 1993 Cadillac DeVille

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