Howl/Whine under acceleration
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Joined: Mar 2013
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Howl/Whine under acceleration
Hello,
as I was driving down the back roads yesterday, a little slower than usual due to icy conditions, I noticed a faint whining noise inside the cab, which I can't really locate where it's coming from. (The wife said she couldn't hear anything lol) I would say it starts at around 40mph and stops at 45mph and is only audible if I press the gas pedal, if I take the foot off or get outside that speed range it disappears completely. Changing engine rpm/gears doesn't change the noise, which gives me reason to believe its coming from the drive line. I've put about 3000 miles on the truck since I've bought it and this is the first time I've noticed this noise, which is probably because I rarely drive at that speed.
After doing some reading online, the symptoms seem to indicate a worn ring&pinion gear? If they are worn, could I drive it until it gets loader and get it fixed then?
I checked the fluids in both diffs today and both of them are overfilled (right under the fill plug) and dirty, the rear is worse than the front. But neither of them smelled burned, so thats a positive
I guess the first step would be taking both covers off to inspect the gears for excessive wear and to change the fluid. The problem I have is that I don't have heat in my shop and temperatures are going down to 10°F, so I think an RTV gasket maker is not really an option right now.
Has anybody tried these gaskets:
https://www.rockauto.com/en/catalog/...l+gasket,13411
How do I find out what size my ring gear is so I can buy the right gasket?
My truck: 2007, Ram 2500, 4x4, Hemi/G56, 71T miles
as I was driving down the back roads yesterday, a little slower than usual due to icy conditions, I noticed a faint whining noise inside the cab, which I can't really locate where it's coming from. (The wife said she couldn't hear anything lol) I would say it starts at around 40mph and stops at 45mph and is only audible if I press the gas pedal, if I take the foot off or get outside that speed range it disappears completely. Changing engine rpm/gears doesn't change the noise, which gives me reason to believe its coming from the drive line. I've put about 3000 miles on the truck since I've bought it and this is the first time I've noticed this noise, which is probably because I rarely drive at that speed.
After doing some reading online, the symptoms seem to indicate a worn ring&pinion gear? If they are worn, could I drive it until it gets loader and get it fixed then?
I checked the fluids in both diffs today and both of them are overfilled (right under the fill plug) and dirty, the rear is worse than the front. But neither of them smelled burned, so thats a positive
I guess the first step would be taking both covers off to inspect the gears for excessive wear and to change the fluid. The problem I have is that I don't have heat in my shop and temperatures are going down to 10°F, so I think an RTV gasket maker is not really an option right now.
Has anybody tried these gaskets:
https://www.rockauto.com/en/catalog/...l+gasket,13411
How do I find out what size my ring gear is so I can buy the right gasket?
My truck: 2007, Ram 2500, 4x4, Hemi/G56, 71T miles
Thread Starter
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Registered User
Joined: Mar 2013
Posts: 8
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No, the cover has a fluid level mark on it which is about 1/2" below the fill hole:
I'm pretty sure its not coming from the engine as the howl does not change if I switch between 3rd 4th or 5th gear.
I'm pretty sure its not coming from the engine as the howl does not change if I switch between 3rd 4th or 5th gear.
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Joined: Mar 2006
Posts: 833
Likes: 68
From: Chesapeake, VA
You should also check and change the fluid in the transfer case.
I agree with bdhunter that it could be a fan clutch. There's plenty of youtube videos showing you how to check the fan clutch.
I have used the gaskets in your link. I like them and find them easier to use than RTV sealant, and I don't worry about excess sealant getting into the diff lube.
I agree with bdhunter that it could be a fan clutch. There's plenty of youtube videos showing you how to check the fan clutch.
I have used the gaskets in your link. I like them and find them easier to use than RTV sealant, and I don't worry about excess sealant getting into the diff lube.