Weird noise from rear of Durango
#12
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Yes it will help if that is the problem. Friction modifier is a liquid you add to the gear oil for the differential. It is not a crazy additive... It's a required lubricant for LSDs (see service manual). The new stuff is synthetic so it lasts a really long time. However, in 2003 it was not so it actually breaks down over time. If that is the problem, it will eventually burn up your LSD. It's general maintenance. You should swap the fluid anyway if you don't know when it was done last.
#13
#14
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Bad advice! A weird noise could be a symptom of something big on the horizon. Determine the problem before you decide whether or not to ignore it.
#15
#16
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2003 does not have a rear washer fluid reservoir from 2001 on ward there is only one washer fluid reservoir in the front of the engine bay, i would second the cehcking the anti-freeze, and look for a drain plug on the rear a/c see if maybe it is storing the condesation instead of draining it it out correctly.