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Old 10-25-2011, 09:24 PM
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rear end slow speed whine/howl

05 limited .... began getting low speed howl/whine in the last 30 days. changed the fluid in rear as thats where it appear to originate from . Had it on a rack and rolling about 20 mph and it was pretty evident. pretty pronounced when slowign to a stop, sounds like youre driving creeper gear on an old 3/4 ton truck


Is that a pinion bearing ? how much to get that dealt with. only 78k miles. I am second owner only about the last 7k. is that somethign that could be diguised ? at Hwy speed its not real noticable. I am running 31" tires and also rotated them and still nothing changed.

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Old 10-25-2011, 09:46 PM
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Re: rear end slow speed whine/howl

did you add friction modifier?
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Old 10-25-2011, 09:52 PM
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Re: rear end slow speed whine/howl

I have this low whine. SOmetimes I feel like it's grinding....Iam going to do the Rear Differential Fluid soon. It could be a bearing.
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Old 10-25-2011, 11:44 PM
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Re: rear end slow speed whine/howl

Quote:
Originally Posted by SvenskaJeepGuy View Post
did you add friction modifier?

I'll second this question!
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Old 10-26-2011, 09:22 AM
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Re: rear end slow speed whine/howl

yes, added mopar modifier....had no impact. anyone have any input on the larger tires perhaps impacting it ? I havent reprogrammed for tire size. Need to get a tuner
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Old 10-27-2011, 10:41 AM
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Re: rear end slow speed whine/howl

my truck had this whine it was my gears out of mesh you might need your rearend looked at ....if you start wearing a new pattern in the gears you will have to replace them
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Old 10-27-2011, 10:44 AM
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Re: rear end slow speed whine/howl

also try driving on a dirt road where there is less traction if it stops then you have a problem.....mine wouldnt whine until i hit pavement ....
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Old 10-30-2011, 11:15 AM
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Re: rear end slow speed whine/howl

I will go off the highway today and check that out. I seem to recall last weekend when out hanging deerstands it still was present. If its still present even off pavement....you think that likley isnt a bearing issue ??? I do notice that at about 50 it is mostly gone or gome altogether. I run a moderate AT tread so there is some tire noise to contend with, but it for sure decreases.
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Old 10-30-2011, 09:59 PM
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Re: rear end slow speed whine/howl

no real change off pavement...... what impact would using 85-140 vs 75-140 have ? any thoughts
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Old 10-31-2011, 12:59 AM
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Re: rear end slow speed whine/howl

im not sure how significant the oil weight would be .......i would still have it looked at........or just run it until it breaks, thats what i do...
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