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Suspension 3rd Gen Dodge Ram Suspension Problems and Questions


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  #1  
Old 10-24-2012, 11:15 PM
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Default Likely culprit of whining open rear diff?

My 04 quad cab 4x4 has a fairly slight but noticeable whine that I believe is coming from the rear diff. I thought at first that it was coming from the tires but I can hear their whine too and it's different. I hear the rear whine mostly at relatively low steady speeds when the truck is in the final gear and not turning too many RPM. It might be doing it other times too and I just can't hear it over the engine and exhaust....I'm not sure though. The truck has the 3.92 open diff.

I know a little bit about some of the problems with the LSD but I don't know anything about the open diffs. I was under the impression that they normally aren't as prone to problems as the LSD.

What is the most likely cause when a whine develops in an open diff? If you have a suspected cause to pass on could you also provide your best guess at repair cost. What's the worst case scenario if I don't get to the problem in time? I'm assuming that about any problem would be fairly easily diagnosed by someone who knows what they are looking at pulling the rear diff cover? Thanks!!
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Old 10-25-2012, 12:24 AM
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Default

after a drive, slide under your Ram & touch the axle housing near the backing plate
if it is warm that is OK, if it is hot to the touch
it could be low fluid level or a bad bearings
If you are still in doubt, pull the cover
watch for metal filings, look for chipped teeth or anything else
with your wheels off the ground, have someone spin the wheels as you watch the carrier assembly
While you looking, check your C clips

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