Fluid interchange
#1
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Fluid interchange
Hey guys, what are you using for an off the shelf replacement for the synthetic rear differential fluid on an 04 3500 dually? I noticed a wine or ringing and found my rear fluid about 3/4" below the bottom of the plug.
#3
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So today I visited the dealer. The fluid part number has changed and it does not include the friction modifier for the limited slip. I bought the friction modifier and passed on their $19 a quart GL-5.
#5
Registered User
Additive in the lubricant. Trac-Rite™ differentials DO NOT require Limited Slip Additive.
It's my understanding we have Trac-rite rear diffs in 3rd Gen.
That being said, it will not hurt the diff to have that in there.
#6
Registered User
Not sure, but I seem to recall the proper fill level on those AAM axles being a half inch or more below the fill plug. I can't remember if the owner's manual has that info, or if you need a shop manual.
#7
Registered User
this is correct, 1/2" below fill hole.. I just replaced my fluid this past weekend.
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