Rear differential

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18CrewDually

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NO.
SAE Syn 75W90 API GL-5 gear oil in both front and rear differentials. Note: Ram specifically states that limited slip friction modifier additive is NOT required for limited-slip rear axles used in 2003 2500s. If you tow often you can use Syn 75w140.
Some oils come with the additive already mixed in and it will be fine using it. Some people run the additive anyways.
 

HemiLonestar

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Instead of rando interwebs opinions, what does your owner's manual say?
 

18CrewDually

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Instead of rando interwebs opinions, what does your owner's manual say?
I guess you're assuming he has the 20 y.o. owners manual. But for your satisfaction here's the excerpt below.
He has a 2500 so it would be the Trac-rite.
Hope that takes the "rando interwebs opinion" out of the equation for you.
Thanks for your help.

Screenshot_20230918_123948_Chrome.jpg
 

HemiLonestar

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It is a valid question (I have mine *shrug*). Most people learn better if they find it on their own, but hey, good job spoonfeeding.
I already had it just in case, but thanks for playing :)
You most be from the "too close to NYC" end lol.

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