Whining coming from... somewhere - Defender Source
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  #1  
Old November 28th, 2010, 05:24 PM
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Whining coming from... somewhere

Just last week my 1997 D90 started to make a slight whining sound. It changes pitch as the automatic transmission shifts gears. I can also hear something I'm not used to hearing at idle. The engine is just making a little more noise than I'm used to hearing at idle. The whine is not horrible but it's definitely there and a new sound.

I found this recent post:
http://www.defendersource.com/forum/...hlight=whining

...but I don't think that's it because the truck doesn't struggle or make any lurches as gears change.

I've checked the fluids fairly recently so i don't think I'm low anywhere to be honest but I'll do that tonight.

ideas?

Hutch
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  #2  
Old November 28th, 2010, 05:39 PM
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did you check the front seat? I get a whinning when the GF sits up front with the top off ; )

check ps fluid then do hard left lock then right and see if the sound changes
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  #3  
Old November 29th, 2010, 09:30 AM
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Quote:
Originally Posted by ron View Post
did you check the front seat? I get a whinning when the GF sits up front with the top off ; )
No, but my wife whines a lot when my girlfriend sits on my lap!

I'll try the power steering when I get home. Plenty of fluid in there though - I do know that. Plus I wouldn't think it would make noise when the truck is at idle. If I rev the engine a bit I can hear it become noisier.
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Old November 29th, 2010, 11:58 AM
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Stephan Laputka
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Did you recently install a CB radio?

------ Follow up post added November 29th, 2010 12:00 PM ------

Ironically my truck is having the same issue. Went wheeling this weekend and I have a whining that increases with engine speed and road speed. Don't notice it unless i'm on the highway and it goes away if I put the clutch in. I also get big whine from somewhere when i go from on power to off power/engine breaking. I'm thinking it might be input bearing on the T-case? Thoughts?
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Old November 29th, 2010, 01:34 PM
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Quote:
Originally Posted by ron View Post
did you check the front seat? I get a whinning when the GF sits up front with the top off ; )

check ps fluid then do hard left lock then right and see if the sound changes
Ron - aren't you a bit old to have just one girlfriend?

Definitely check the magnet on t-case drain plug. I had a case whine for 18+ months before it finally blew up.
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  #6  
Old November 29th, 2010, 02:38 PM
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Quote:
Originally Posted by JimC View Post
Definitely check the magnet on t-case drain plug. I had a case whine for 18+ months before it finally blew up.
I will probably have time this weekend to check the drain plug.

The noise - I can hear it even at idle - doesn't seem to be part of the drive train. It seems to be almost up towards the block itself. (take it with a grain - I only know enough to be dangerous.)

As far as the CB - no nothing like that. It *seems* more mechanical and not eletrical interference like I get sometimes with my tape deck mp3 player.

Thanks for the input...

-h
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  #7  
Old November 29th, 2010, 07:40 PM
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Take a look at the tension pulley right below the alternator. When mine went on my 94 it was whining really bad.Get a stethoscope at pepboys with the metal rod...works great to find the source.
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Old November 29th, 2010, 07:44 PM
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On my 97, I had a whine that turned out to be 2 things, the idler pulley and the alternator. Changed them both, whining went away.
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Old November 29th, 2010, 08:35 PM
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My 95 D-90 driveline gets a low pitch moan/whine when above about 25 mph, changes pitch with speed, only under load, let out the clutch or off the gas it stops. My guess is front diff, but all fluids good, no metal on magnets so I figure just a standard noise. I wold guess your noise related to a part or pully on the motor.
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Old November 29th, 2010, 08:44 PM
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Quote:
Originally Posted by jhhorse View Post
My 95 D-90 driveline gets a low pitch moan/whine when above about 25 mph, changes pitch with speed, only under load, let out the clutch or off the gas it stops. My guess is front diff, but all fluids good, no metal on magnets so I figure just a standard noise. I wold guess your noise related to a part or pully on the motor.
mine too ... I think diff whine is standard issue ..
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  #11  
Old November 29th, 2010, 09:25 PM
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Thanks Jim GF's are funny... they dont like to see the other GF's

also check the belt try some belt dresser or wd40 and see if t goes away
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  #12  
Old November 29th, 2010, 11:25 PM
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All GF's are different, but somehow all wives are the same.......
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  #13  
Old November 30th, 2010, 12:24 AM
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The GFs only act different until they've get you to the altar...then you find that they're all the same - CRAZY!
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  #14  
Old November 30th, 2010, 09:23 AM
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I recently had a bad whine on my 2003 Disco II. Turned out to be the bearings in the AC compressor clutch.
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  #15  
Old December 1st, 2010, 09:14 PM
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Yeah, to identify it on the front case get a can of lithium or WD40 and carefully spray behind each pulley (not getting it on the belt) and when it goes away you've found the correct dry-bearing that needs changing.
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  #16  
Old December 1st, 2010, 09:30 PM
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Now my whining noise is confirmed , alternator , flatbed to LR Manhattan today .
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  #17  
Old December 30th, 2010, 08:57 PM
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Thought I'd follow up.

In fact mine was the alternator as well. It was the original and the mud that was jammed in there was the final straw. It's still functioning but it's getting ready to go. The bearings have had it.

Thanks for all the advice D-90.
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