- #304 of 353
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Re: Mysterious Noise [tuggajb]
by jbstorm
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Dec 02, 2008 (3:01 pm)
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Replying to: tuggajb (Dec 02, 2008 1:41 pm)
I have a ujoint which I replaced. The good news is today the problem was solved. The noise ended up being the transmission shifter cable which was slightly rubbing against the front shaft when in drive. A wire tie later and this issue is gone.
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- #305 of 353
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Re: Mysterious Noise [tuggajb]
by cardiology11
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Dec 02, 2008 (5:31 pm)
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Replying to: tuggajb (Dec 02, 2008 1:41 pm)
It has CV joint that I can see, but I am not sure what a CVC joint is
Thanks Mark
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- #306 of 353
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Re: Mysterious Noise [jbstorm]
by indywood
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Dec 02, 2008 (6:10 pm)
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Replying to: jbstorm (Dec 01, 2008 6:34 pm)
hey, someone on the same page- no, still haven't fixed the problem. Did find a bad C/V boot on the front propshaft, as well as a few other people suggesting a bad propshaft, plan to replace next weekend- will let you know how it works out : confuse:
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- #307 of 353
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Re: Mysterious Noise [cardiology11]
by tuggajb
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Dec 02, 2008 (7:37 pm)
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Replying to: cardiology11 (Dec 02, 2008 5:31 pm)
sorry one c to much
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- #308 of 353
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Re: Jeep engine Vibration [trek87]
by thundy
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Dec 16, 2008 (1:59 pm)
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Replying to: trek87 (Nov 19, 2008 6:59 am)
Sooo... i got my new battery changed & spark plugs had fuel injection system serviced. Today i took my car to the airport, the vibration stars again! Ahhhhh! i have been driving my car just around the blocks & seemed very normal. However, it seems like longer i drive, the vibration occurs. Although my mechanic felt the vibration & he ran some test, he couldn't find any problems. my tires fine.. everything else seems fine. not sure what is the cause???
Happy Holidays!
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- #309 of 353
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Re: Over Drive Humming/Roaring like a Wheel Bearing [jeep4life0604]
by dlevings
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Jan 21, 2009 (1:38 pm)
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Replying to: jeep4life0604 (Sep 16, 2008 1:12 pm)
I am hoping you are willing to help me too! I am losing my mind trying to figure this out on my 2002 Jeep Grand Cherokee Overland. I am not positive if my problem is exactly the same, but it is very similar. I have a grinding noise that sounds like it is coming from the driver side front. It has a low grind that continues anytime the accelerator is engaged. It couldn't be heard by others originally, but now even the passengers can hear the grinding. It isn't loud and annoying, but just unsettling. I have replaced bearings, had the transmission broken down looking for a problem, etc. It also "clunks" when making deep turns and shakes when braking with a sharp decline in speed on a downhill slope, but I am unsure if these are related or just more problems. Any help or insight would be VERY much appreciated!!!
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- #310 of 353
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Re: Jeep engine Vibration [thundy]
by trek87
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Jan 21, 2009 (1:47 pm)
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Replying to: thundy (Dec 16, 2008 1:59 pm)
the only other thing that comes to mind is the differential bearings or the spindles that mount it to the main crankshaft...but now i'm getting into the realm where i'm b/s'ing
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- #311 of 353
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Re: Over Drive Humming/Roaring like a Wheel Bearing [dlevings]
by trek87
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Jan 21, 2009 (1:57 pm)
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Replying to: dlevings (Jan 21, 2009 1:38 pm)
if you have AWD it sounds suspiciously like the transfer case. an inspection of the transmission wouldn't have found anything if it is the transfer case. you'd need to provide more details, but the low-level grinding might be the tc bearings or a loose chain.
as for the turns, you could have a worn axle boot or bad cv joint. if you hear a popping sound when the wheel is hard-over, it's another indication of a bad cv joint or u joint.
it sounds like you have warped brake rotors.
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- #312 of 353
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Re: Over Drive Humming/Roaring like a Wheel Bearing [trek87]
by dlevings
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Jan 22, 2009 (9:01 am)
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Replying to: trek87 (Jan 21, 2009 1:57 pm)
Okay...I did a few "tests" last night on my way home from work. I agree that it probably is not the transmission. When I said the low grinding sound is anytime the accelorator is engaged, this was incorrect. It is anytime the vehicle is in motion. If I am stopped, you do not hear the sound. However, if the Jeep is moving...even while shifted into neutral...the sound continues. Over drive on or off does not make a difference either. I do have AWD, so do you still think it is in the transfer case? To describe the sound a little better, it is a combination between a low grinding and the sound large thread tires make on the road....but I don't have large thread tires and the sound did not change when I put new tires on before winter. Are there any specific questions I could answer to make it easier to diagnose? I really appreciate the help! I would love to get this fixed!! This Jeep has just been one problem after another lately.
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- #313 of 353
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Re: Over Drive Humming/Roaring like a Wheel Bearing [dlevings]
by trek87
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Jan 22, 2009 (10:08 am)
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Replying to: dlevings (Jan 22, 2009 9:01 am)
the sounds you describe are coming from the transfer case, which is further supported by the fact that you hear the murmuring whenever the vehicle is in motion (even with the transmission open). the murmuring noise should be directly tied to vehicle speed if this is the case, in the sense that the sound gets "faster" as you move faster.
your description sounds virtually identical to what i hear from my 249 TC in my '98 GC. another confirmation would be to move the quadra-trac drive control lever (which is connected directly to the TC) slightly and you may hear the sound become louder or softer while moving. it is also possible the overdrive is contributing at speeds above 40 mph - to test this, disengage the overdrive while coasting and see if it gets a little quieter. the overdrive has a viscous clutch (like the TC) that get's noisy at high mileage.
a noisy TC is common with jeeps, so it's not necessarily something you need to worry about. mine's been getting steadily louder since about 120K, and i now have about 140K. just keep servicing your differentials/TC every 20K and you should be OK. if your TC starts to fail you'll know it  . i'll hold off replacing mine until i can no longer hold a conversation inside my truck. but if you have $1500 to throw at it, all the power to you.
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