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Differential howls after replacing the input seal

After replacing the input seal and tightening the retaining nut the unit howled. Loosened up the nut and howl was less. Repositioned the center hangar bearing housing and less howl. Is there an optimum setting on the retaining nut?



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1998 dodge durango. howling noise differential.

time to pull the diff centre as the noise is from incorrect positioning of the crown wheel and pinion. This happens from failed pinion bearings or side carrier bearings.. Could be lack of oil or the wrong oil if it is a limited slip diff.

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2 Answers

Front axle/differential 4x4 making howling noise

there could be four different issues. out of oil, bearings are in need of replacement(could be also of the previous), possibly even out of time or teeth are needing adjusted for proper meshing.
I am not there to hear the howl so i cannot determine perfectly for you.
you will need to any any of these cases remove the differential cover and inspect interior of housing and oil if any remaining for metal and worn parts.
I would suggest getting the repair manual for your vehicle as this can be a difficult process and can cause serious issues if not done correctly.
If i am remembering correctly these are not a hunt/ search differential. meaning they don't have a specific setting point for gearing.
If they are set timing they will have indents on gears that must be aligned when assembled.
also check for excessive movement of pinion gear.(signs of wear and needed maintenance such as excessive oil leakage.)
also when the book states a certain amount of foot or inch pounds to tighten the pinion it does not mean to tighten it that much. it means when you spin the pinion gear that is how much force required to keep turning it.(as you are turning the pinion the gauge should read that amount)
in other words if you are turning the pinion you should be applying ## foot or inch lbs. so you would tighten the retaining nut until this point is achieved.

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1 Answer

I have a loud howling noise coming from rear does it when i am on and off the throttle and it is very loud.2004 dodge slt4x4 5.7 hemi

Hello! This could be from a few things - you could have a differential pinion gear that is misaligned and that will cause a howling noise - or it could also be a wheel bearing. Check your differential fluid and it might be worthwhile changing it.

Hope this helps and good luck!


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1 Answer

2003 Chevy Blazer 4x4 making howling noise in front end.

as stated above, check the transfer case fluid level, also check the fluid in the front and rear differentials, make sure it is full and clean. if the howling still exists it can also be caused by hub bearings, or differential bearings.

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As a matter of fact the diff can make noise on and off the gas, my own car a 1996 Corvette does this, it needs the ring and pinion replaced, is this what you are talking about when you say they told you that you needed a whole new differential?

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1 Answer

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sounds like your differential carrier needs to be shimed,common when changing ring and pinion

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