Rear diff fluid?

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salps
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Rear diff fluid?

Post by salps » Tue Jun 19, 2012 12:15 pm

I have searched for this and can't find it. Awhile ago I heard on this forum the rear diff fluid is different than a standard 2500 ram. Dealer says no. Anybody know about this or can get me link to topic?
Thanks Scott
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bstefanic
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Re: Rear diff fluid?

Post by bstefanic » Tue Jun 19, 2012 12:25 pm

A lot of rear diff fluid comes with a limited slip additive...its been a while since I changed mine and someone can back me up on this but I'm almost 100% positive the manual specifically says NOT to use a limited slip additive. I just went with royal purple and all seems well.
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Re: Rear diff fluid?

Post by FirerescuePW » Tue Jun 19, 2012 12:26 pm

bstefanic wrote:A lot of rear diff fluid comes with a limited slip additive...its been a while since I changed mine and someone can back me up on this but I'm almost 100% positive the manual specifically says NOT to use a limited slip additive. I just went with royal purple and all seems well.
Correct.

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Re: Rear diff fluid?

Post by stamm20 » Tue Jun 19, 2012 12:37 pm

I agree with them the only requirement is it does have to be full synthetic i run 75w-90 lucas full synthetic in both front and rear of mine
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salps
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Re: Rear diff fluid?

Post by salps » Tue Jun 19, 2012 12:37 pm

Thanks for the info...
Scott
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Re: Rear diff fluid?

Post by Pit Slave » Tue Jun 19, 2012 6:03 pm

Limited slip additive, or friction modifier, is not required in a helical limited slip setup in the diff of an AAM axle with elockers. Not required is not saying prevent from using, it simply means that having it in there won't hurt anything. Now if you have a diff that uses a clutch pack type of limited slip then not having a limited slip additive when required to, can cause premature wear of the unit and/or excessive heat buildup.
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Throttle 8
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Re: Rear diff fluid?

Post by Throttle 8 » Tue Jun 19, 2012 6:56 pm

Pit Slave wrote:Limited slip additive, or friction modifier, is not required in a helical limited slip setup in the diff of an AAM axle with elockers. Not required is not saying prevent from using, it simply means that having it in there won't hurt anything. Now if you have a diff that uses a clutch pack type of limited slip then not having a limited slip additive when required to, can cause premature wear of the unit and/or excessive heat buildup.

Dead bang on answer!
I looked it up and that is text book. Also, most of the best synthetics have the friction modifier in them. It will not hurt you if it is there. Just choose the oil you like and you are good to go.
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Re: Rear diff fluid?

Post by AceMan » Tue Jun 19, 2012 7:45 pm

I have Mobil One in my diffs. I can't remember if it has the additive or not, but as Pit said, it doesn't matter.
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Re: Rear diff fluid?

Post by RustyPW » Wed Jun 20, 2012 4:52 am

I have Mobil1 with the LS in it. Doesn't hurt. ;)
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