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Differential oil


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NavyVet88
User
NavyVet88 profile image

Aug 31, 2015, 2:55 PM

Post #1 of 6 (718 views)
Differential oil Sign In

Hey guys,
Quick question, how do I go about figuring out what kind of differential oil do I need for the front and rear diff on a 1999 ram 1500 360 5.9L? The owners manual is missing and I don't know if the prior owner had this service done. It's got 80k miles on a rebuilt engine so I'm assuming it hasn't been serviced and I'm also assuming it's gonna be a 80w-90 oil?
Take care of it and it'll take care of you!


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 31, 2015, 4:13 PM

Post #2 of 6 (709 views)
Re: Differential oil Sign In

Get a dang manual for the thing! Jeez!


What the heck difference does a new/redone engine have to do with the differential? It may still have a tag marking what it is. Could be limited slip or regular or some other creation?


Most are regular but that's not good enough. Hoist rear wheels and spin one. If both spin the same it's limited slip and if other spins other direction it's regular and those DO use different gear oil.


So - Check it anyway it may be full? Are there leaks at it, where driveshaft goes in or at wheels? Good sign if not.


If not tag and you know any info from the door jam or more about it ask at specifically a NAPA grade parts outlet and they should ask YOU any questions if not from info you can provide on the spot,


T



NavyVet88
User
NavyVet88 profile image

Aug 31, 2015, 4:20 PM

Post #3 of 6 (705 views)
Re: Differential oil Sign In

Why are you so angry? A lot of post from you seem to be really smart ass when all someone needs is some helpful advice.

The engine info is there because all of you guys seem to ask about the engine when it seemingly Isnt necessary
Take care of it and it'll take care of you!

(This post was edited by NavyVet88 on Aug 31, 2015, 4:21 PM)


NavyVet88
User
NavyVet88 profile image

Aug 31, 2015, 4:22 PM

Post #4 of 6 (702 views)
Re: Differential oil Sign In

I'm gonna find another website to get help from
Take care of it and it'll take care of you!


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Aug 31, 2015, 4:36 PM

Post #5 of 6 (698 views)
Re: Differential oil Sign In

Sorry #1. Been one of those days for me. It's plain important to have the original owner's manual and info it contain for about anything. For many tons older there was no suggestion to change gear oils just check it then you would need to know what kind. I can't as I do know if this one is not typical and some aren't it would be different gear oil and you do NOT mix them.


I told you how to tell what basic type it would be that a certain parts outlet would tell you if you need any at all and if leaking that's the very next thing to worry about as it could wreck rear brakes if leaking at a wheel or if way too low really bad for differential in entirety. It's worth checking but if it need any the bigger question is WHY.


Almost all will use a mid high bolt or square level check threaded thing tons were plain 3/8th squares. If other size use that.


Trick is all I know of you just take that out and either put your finger in there for oil or bend a Q-Tip to see the level. If that doesn't reach oil back to the question why is it low?


Owner's manual may have a suggestion to change this oil and would be nice to know. Except a few mostly foreign ones there's no drain plug so know you suck it out or pull a cover that may have no gasket or one to replace OR make you own.


Lots of maybe things about this. Just checking it now shouldn't be a big deal,


Tom



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Aug 31, 2015, 6:31 PM

Post #6 of 6 (692 views)
Re: Differential oil Sign In

It takes regular GL-5 in 80W90 weight.

If it's a limited slip you will have to add friction modifier.



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