3:58 pm
Club Member
July 10, 2003
Offline
I've got most of my Jeep problems fixed. But, I still have a whining sound. Maybe you guys can help me pinpoint it. It's a high pitch whine, not quite a whistle. It is RPM sensitive, gets louder when RPMs clinb up. The gears must be engaged to make the sound, I can't just rev the engine and make it happen. It totally disapears in fourth gear. Remember, it can't be in the front because I have locking hubs, so nothing is turning up there. Ideas?
My first thought is the transfer case...
I used to wheel a lot. . .
4:05 pm
January 7, 2003
Offline I have that whine also. Especially on the freeway. The faster I go the louder it gets. I found its coming from around the passenger seat. Its my wife. 😀
4:08 pm
Club Member
July 10, 2003
Offline "Howdy" wrote: Its my wife. 😀
I totally fell for that...that was funny
I used to wheel a lot. . .
4:11 pm
May 4, 2004
Offline Is the whine engine rpm related or speed related?
4:13 pm
Club Member
July 10, 2003
Offline RPM related, but only when gears are engaged, I can't just rev the engine to make it happen. When I shift gears up (lower the RPMs), it gets more quiet, then it builds as the RPMs climb.
I used to wheel a lot. . .
4:15 pm
Club Member
July 10, 2003
Offline Also, I've noticed it more when the Jeep is cold. It gets much more quiet as the Jeep warms up.
I used to wheel a lot. . .
4:54 pm
May 4, 2004
Offline If the noise is strictly rpm related and not speed related, my guess is the transmission is what's whining. You might want to check/change the oil in the transmission, particularly if you've been in water recently. It could be the breather tube came off the transmission and now you've got some water in it.
Didn't this start after your last Fordyce trip?
4:57 pm
Club Member
July 10, 2003
Offline CORRECTION:
I just drove it and it does make the noise when not in gear...i.e...I can rev the engine and it will increase the whining...so it must not be gear related.
I used to wheel a lot. . .
4:58 pm
Club Member
July 10, 2003
Offline "FAM" wrote:
Didn't this start after your last Fordyce trip?
No, it's been going on for a while. It just takes me some time to get around to worrying about it. I always like to see if the noises will go away on their own first. 
I used to wheel a lot. . .
5:10 pm
May 4, 2004
Offline "JohnDF" wrote: CORRECTION:
I just drove it and it does make the noise when not in gear...i.e...I can rev the engine and it will increase the whining...so it must not be gear related.
So you can hear the whining when you're sitting still? Try it in with your foot off the clutch and transmission in neutral and also try it with your foot on the clutch.
5:19 pm
Club Member
July 10, 2003
Offline Makes no nevermind if the clutch is in or not. I definately think it is louder in gear (under load).
I used to wheel a lot. . .
5:22 pm
May 4, 2004
Offline Can you hear the whining when you're sitting still or only when the Jeep is rolling (loader under load)?
5:25 pm
May 4, 2004
Offline And you say you hear the noise in every gear except 4th gear? Is that regardless of rpm's in 4th gear?
5:32 pm
Club Member
July 10, 2003
Offline Maybe I'm going to fast by the time I hit fourth gear 😀
I used to wheel a lot. . .
5:45 pm
May 4, 2004
Offline I'm not a doctor but I played one when I was a kid . . . My diagnosis, based on what you've said so far, is you've got a problem in the rear end. Considering the whining is louder when you're under load than when you're coasting, my first thought is its a ring & pinion set up problem. I don't think you've had any r&p work done recently so it could be worn pinion bearings allowing slop and misalignment in the pinion to ring gear fit.
I would start by pulling the rear diff cover and checking for water and/or metal flakes in the oil. Also check for any broken or oddly worn teeth on the r&p.
My next guess would be the rear wheel bearings. I suppose it could be as simple as a dried up and worn rear driveshaft ujoint.
5:58 pm
Club Member
July 10, 2003
Offline Why would a R&P whine louder when the clutch is engaged and was not under load?
I used to wheel a lot. . .
6:04 pm
May 4, 2004
Offline "JohnDF" wrote: Why would a R&P whine louder when the clutch is engaged and was not under load?
I thought you said the whining was louder under load than when it wasn't under load?
Maybe we need to start over again.
1) Do you hear the whine with the Jeep stationary or in motion or both?
6:17 pm
Club Member
July 10, 2003
Offline "FAM" wrote:
1) Do you hear the whine with the Jeep stationary or in motion or both?
BOTH!!!! But it's louder under load 
I used to wheel a lot. . .
6:18 pm
Club Member
July 10, 2003
Offline Who's on First???
I used to wheel a lot. . .
6:26 pm
May 4, 2004
Offline So you hear the whine when your Jeep's sitting still, coasting down the road, and hear it even louder when you're accelerating. And earlier you said you could hear the whine with your foot on the clutch and also if your foot was off the clutch.
With that criteria, I would say the whine has something to do with your engine. Maybe one of the belt driven items - power steering pump, alternator, a/c compressor, York air compressor, water pump. It might also be a vacuum leak - hose, intake manifold, etc.
You might be able to remove the serpentine belt and run the engine for a very short time. If there's no more whine you know it's something driven off the belt. But don't do this very long. Your water pump won't circulate water and your engine will overheat very quickly.
6:51 pm
Club Member
July 10, 2003
Offline Removing my serpentine is a major pain in the butt (YORK has to be removed).
I used to wheel a lot. . .
6:54 pm
May 4, 2004
Offline "JohnDF" wrote: Removing my serpentine is a major pain in the butt (YORK has to be removed).
Sorry, I'm about out of ideas. Maybe someone else will come up with something else.
7:00 pm
February 5, 2003
Offline "JohnDF" wrote: Who's on First???
I don't know.
Closed Mondays.
7:02 pm
February 5, 2003
Offline "JohnDF" wrote: Why would a R&P whine louder when the clutch is engaged and was not under load?
it has to do with drive side and coast side gears.
I would pull the cover check for bad mojo, and if it otherwise looks OK,
put some gear marking compound on the gears, run it around for a few turns,
Then take some pics and post them on pirate general as a "gear pattern check thread"
If might be a clue of a problem or they might be fine.
Closed Mondays.
7:03 pm
February 5, 2003
Offline "FAM" wrote: [quote="JohnDF"]Removing my serpentine is a major pain in the butt (YORK has to be removed).
Sorry, I'm about out of ideas. Maybe someone else will come up with something else.
pull your rear shaft, drive in FWD and see if the noise continues.
Closed Mondays.
1 Guest(s)
