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Old 10-19-2012, 09:37 PM   #1
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Default Whine in front end

I have noticed that in 4wd, there is a whining noise from the front end. It seems to be mostly when letting off the throttle and changes pitch if I accelerate. If I can hold a steady throttle, it is much quieter. In 2WD, the noise is completely absent. Should I assume this is a pinion bearing issue? It seems to have developed since I replaced the ball joints, but honestly I don't use 4WD often, so it could be coincidence. I had a leaking pinion seal replaced a couple years ago, but it was quiet after the replacement. Any suggestions?
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Old 10-19-2012, 09:40 PM   #2
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Check your diff fluid.
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Old 10-19-2012, 09:48 PM   #3
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I have, it's full. Sorry, forgot to mention that.
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Old 10-19-2012, 09:49 PM   #4
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Quote:
Originally Posted by 1127xj
I have, it's full. Sorry, forgot to mention that.
Not talking about fluid levels... The actual condition of the oil
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Old 10-19-2012, 09:54 PM   #5
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4-lo or 4-hi? normally in 4-lo, i've gotten a whine in all the Jeeps i've ever had...in fact, that's how i know 4x4 is working...
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Old 10-19-2012, 10:04 PM   #6
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4Hi. I haven't changed the fluid, but it was changed when the pinion seal was replaced.
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Old 10-19-2012, 10:05 PM   #7
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4Hi. I haven't changed the fluid, but it was changed when the pinion seal was replaced.
Without dumping it, it doesn't show any obvious signs of contamination.
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Old 10-19-2012, 10:07 PM   #8
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Quote:
Originally Posted by beefmobile View Post
4-lo or 4-hi? normally in 4-lo, i've gotten a whine in all the Jeeps i've ever had...in fact, that's how i know 4x4 is working...
That would be the transfer case, all transmissions/transfer cases make that noise in really slow gears. My Ranger does it in first. No clue what causes it though, something i want to figure out.
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Old 10-19-2012, 10:09 PM   #9
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Now that i think about it, my rear diff makes that noise at highway speed, i always figured it was normal... I'm thinking otherwise now.
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Old 10-19-2012, 11:58 PM   #10
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This is a new noise, don't believe it's normal because it was never there before.
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Old 10-20-2012, 02:31 AM   #11
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Check tc fliud level lately?
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Old 10-20-2012, 05:50 PM   #12
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Check tc fliud level lately?
yep, it's full.
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Old 10-21-2012, 06:08 PM   #13
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BTW, I did bring it to the dealer, and was told something is going in the ft. diff. or tc, but they were not sure what it is. They recommended I drive it until it gets louder so they can pinpoint it. Then they charged me $80 for "diagnosis." I already knew that much, thanks a bunch. This is why I rarely visit dealers, what a load of crap...
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Old 10-21-2012, 07:12 PM   #14
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I ONLY go to the dealer if i need Mopar parts in a hurry.
IDK about all AAMCO's, but the one i always go to usually diagnoses for free. They tore my transmission apart a week ago free of charge. I'm sure you can find a place that does free diagnostics.
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Old 10-23-2012, 01:25 AM   #15
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Quote:
Originally Posted by 1127xj View Post
Without dumping it, it doesn't show any obvious signs of contamination.
very true...found this out when i changed mine....looked like coal water...previous owner mustuve never changed it..in fact myb it had never been changed at all
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its all in your altitude,horn broke watch for finger (thanks for putting it straight freedr)
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Old 10-23-2012, 01:25 AM
 
 
 
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