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-   -   Another New noise... (http://www.jeepgarage.org/f203/another-new-noise-31213.html)

RaZX6R 11-17-2011 10:22 AM

Another New noise...
 
Hello all, I've got an issue but I don't know if it's normal or not.... I have an 04 WJ limited that I bought this past february....and so far it's been a domino effect of sensor failure for me... most recently it was the oil pressure sensor... So my question today is when I went to the store and returned home everything seemed fine, engine seemed like it was running perfect, turned the key to shut it down and there was like a grind and vibration that seemed like it came from underneath right in between the driver side door and tire... started the truck up again and turned it off and then it was gone... I had noticed this once or twice before in the last 2 weeks or so but I thought I was just looking for something to be wrong since all the sensor trouble... but now I know it's there and have no idea what it is....any info or experience with this would be great!!!..... Thanks alot!!!:D

Terminator2 11-17-2011 11:13 AM

Re: Another New noise...
 
Does it grind when you start it? if so, the starter solenoid may be sticking. You know that noise when you accidently turn the key when the engine is running?

RaZX6R 11-17-2011 11:17 AM

Re: Another New noise...
 
nope, only when I shut it off.....there was one time when I thought maybe I heard it while I was driving..... transfer case maybe??? It only does it sometimes....so I can't trace exact location.... this Jeep is seriously starting to aggravate me....

Me Fix 11-17-2011 11:28 AM

Re: Another New noise...
 
That sounds like it could be just about anything. I think I would start by lifting the hood and while standing there looking into the engine compartment, I'd have someone else turn the key off. Maybe if you heard it then, you could start pin pointing the area where the sound is coming from. What you described is not much to go on, but there are lots of others willing to help if you can better describe the sound and area.

RaZX6R 11-17-2011 11:34 AM

Re: Another New noise...
 
I know it's pretty general, but like I said it doesnt do it very often and the noise is definitely coming from underneath.... a better description I guess would be a motor grinding to a stop... I went out and started it and shut it off about 5 or 6 times a few minutes ago... put it in gear, then in park, even reverse... let it sit in gear for a minute or two.... still couldnt get it to do it again.... I just dont want to be worried that something major isnt gonna fail on me

Me Fix 11-17-2011 12:21 PM

Re: Another New noise...
 
Intermittant problems are the pits! Underneath? You have the V8, so listen to the exhaust piping on the drivers side. Is it heat related? After driving at highway speeds or slow town driving? Has the convertor gone into "lockup" during your drive? What drive system does your ride have, Quada Drive, Quadra Trac, Select Trac? I think there were something like 10 different types of drive systems available, but maybe not that many in 2004 per your WJ. Just keep your eyes and ears tuned in. Sooner or later you will pick up on something that someone here has experienced before.

RaZX6R 11-17-2011 12:41 PM

Re: Another New noise...
 
It seems like it does it after driving around for awhile... in town or on highway... it has quadra-drive... what do you mean by convertor lock-up??

TJXJWJ 11-17-2011 02:13 PM

Re: Another New noise...
 
Just for shizz...have you crawled under there while it's running to look for any exhaust leaks? There really isn't much between the driver's door any tire that I could think of that would make a stupid noise when you shut the Jeep off. If you think of it, next time you go to get out and shut it off, see if you can get a recording on your phone or something you can post up here.

Me Fix 11-17-2011 04:39 PM

Re: Another New noise...
 
Lock up is what some might call overdrive. I might be wrong with what I call it, but it's when the convertor shifts into what appears to be a higher gear. If your does that, there might be a problem with it staying in lock up and not droping back out. Just guessing as to something going on there as the convertor is part of the drive train and it turns until you turn off the key. If it is locked up, it might give off a different noise. The last response ws good in that it is suggested you have a look and maybe even listen from the under side. Like he said, it's hard to even suggest something there as there is just not much right there other than the eshaust piping from the left bank of your V8.

Frango100 11-17-2011 07:04 PM

Re: Another New noise...
 
The torque converter lock-up function is just a mechanical clutch which in fact makes the input and output of the torque converter fixed. In this way you won't get any losses, which is a normal part of any fluid coupling. If this one won't release, its like a car with mechanical clutch and you don't put your foot on the clutch pedal, you will kill the engine when stopping. Should not be the problem here.Torque converter lock-up and overdrive are two different things. Overdrive is nothing more then a gear ratio inside the tranny, where you get more speed out of the tranny then you put in. All the other gear ratios are named underdrive, where you get less speed out of the tranny then you put in. Overdrive is there to safe fuel and have less noise from the engine. The 5-45 RFE for example has 3 forward underdrive ratios (1, 2 and 3) and 2 overdrive ratios (4 and 5) I didn't count the second prime, which is used for highway passing and is a little different then the normal 2nd gear ratio, but also an underdrive.

RaZX6R 11-17-2011 11:13 PM

Re: Another New noise...
 
thanks for the info guys...I'll have a look and listen tomorrow morning.... could it have anything to do with the button to turn the O/D on and off?? there were a few times I would accidentally hit that button at highway speeds and also at normal drive around town speeds... hopefully its just an exhaust issue and not a tranny issue.... thanks again and if I find a location I'll be here to ask what it is...

Frango100 11-18-2011 05:38 AM

Re: Another New noise...
 
When you hit the overdrive button, you send a signal to the PCM and just switches off the overdrive gears of the tranny, so the tranny goes to 3rd gear maximum, depending on the speed. If you are driving on the highway and you hit the button, the tranny returns to 3rd gear and the engine consequently revs up. But hitting the button when standing still, doesn´t do anything then an electrical input to the PCM and should not cause any noise.


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