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Old 04-21-2009, 04:47 PM   #1
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Whinning rear end

I have a 94 wrangler with the 4 cylinder engine, about a month ago the rear end started to whine, I removed the cover and replaced the oil. Did not see any metal shavings or anything broke. I used oil 75W-90 API GL-5 but it still whines, Any Ideas to help for a while. I have never rebuilt a rear end so it's not something a feel comfortable doing. Will heavier oil help? The jeep has 150,000 miles and run pretty good except for this

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Old 04-21-2009, 05:02 PM   #2
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How loud is the whine? Is it constant? Does it change with speed? When turning? Mark W.

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Old 04-21-2009, 05:12 PM   #3
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It's not very loud, just more annoying. It only whines when under a load, if I depress the clutch and let the vehicle coast it will not whine. Maintaining a speed of about 50 to 60 is the loudest.
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Old 04-21-2009, 05:21 PM   #4
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When I saw the title, I thought this thread was about a certain WF member.

lol
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Old 04-21-2009, 05:45 PM   #5
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rear end noise usually stays constant with the speed regardless of load. but if the pinion bearings are shot that could be the case. most likely the pinion bearings are bad, and all the bearings should be replaced.
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Old 04-21-2009, 05:57 PM   #6
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i had a whinning rear end...i divorced her and she moved to santa rosa
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Old 04-21-2009, 06:10 PM   #7
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Quote:
Originally Posted by jpdocdave View Post
rear end noise usually stays constant with the speed regardless of load. but if the pinion bearings are shot that could be the case. most likely the pinion bearings are bad, and all the bearings should be replaced.
thats what i was thinking also pinion bearingsneo
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Old 04-21-2009, 10:41 PM   #8
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Quote:
Originally Posted by NAVYCHIEF View Post
i had a whinning rear end...i divorced her and she moved to santa rosa
Yeah- I was gonna say, FINE! Let your wife/girlfriend move up to the front seat, and the whining should go away Mark W.
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Old 04-21-2009, 11:14 PM   #9
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Have you tried Beano?
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Old 04-23-2009, 09:55 AM   #10
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I had the same problem how I diagnosed exactly where was. Was placed it up on jack stands ran it while (buddy in the jeep operating it) listening to the rear end using a screwdriver to my ear to pinpoint it, ended up being the pinion bearing. I swapped it out has fine now for over a year. Mine had just over 100k on it at the time.
Hope this helps.
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Old 04-23-2009, 03:43 PM   #11
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I agree – betting it is the pinion bearings… Oh - got to go - my whining rear end it telling me to get off the computer (Smile)…
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Old 04-24-2009, 05:32 AM   #12
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Banana peels work great for rear end noises But you should fix it the "right way" if you plan on keeping it.
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Old 04-24-2009, 06:16 AM   #13
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Banana peels work great for rear end noises But you should fix it the "right way" if you plan on keeping it.
I can remember an old friend stuffing two loaves of bread into a Chevy 10 bolt, back in the 1980's!

To the O/P, have you been able to verify that it is actually the rear axle making the noise?

I'm thinking it could be the T-case. If you have a rear driveshaft slipyolk, there is a bushing in the tail housing. It's there to keep the slipyolk from wobbling.

If the seal back there is leaking, it's a good idea to replace both the seal & the bushing.

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