Changine diff fluid in 2002 Explorer, little help

[Nitrox]

Bought a 2002 Explorer XLT from CarMax. Had 23k on it, now has almost 31k. I have a little over 3 quarts of RedLine 75w-90 diff fluid left over from a change in my Mustang, so I want to put it in the Explorer. I don't have an owner's manual, so I don't know if that is the correct weight to use, and since it's not a live axle setup, I would like some direction on how to change it, unless it's the same or similar procedure as with a live axle. Did a little searching online without success.

Thanks.

 

[Nitrox]

Found info online. I need 75w-140 for the rear diff. Manual said the diff fluid is good to 100-150k unless it gets submerged.

I am going to change the rear diff fluid to either Redline or Schaeffer's, whichever's easier to get. Should I add anything else to the oils? The diff's a limited slip type.

 

[sbc350gearhead]

If it is a clutch disc type posi, then you need a fluid with friction modifiers, or you need to add a FM additive. I have no experience with those fluids, so I can't comment on them.

 

[dkcase]

quote:

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Originally posted by Nitrox:

I am going to change the rear diff fluid to either Redline or Schaeffer's, whichever's easier to get. Should I add anything else to the oils? The diff's a limited slip type.

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Redline and Schaeffers are both equally easy to get. You can order either from a sponsor on this site.
I have Schaeffers #267 80W90 in the rear of the Jeep.. 8.25 inch Chrysler Trac-Loc... Although the oil contains a friction modifier, I do get some noise. I plan to use one of the additives and see if that stops it.
The front of the Jeep has Redline, 75W140.

 

[jsharp]

quote:

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Originally posted by Nitrox:
Found info online. I need 75w-140 for the rear diff. Manual said the diff fluid is good to 100-150k unless it gets submerged.

I am going to change the rear diff fluid to either Redline or Schaeffer's, whichever's easier to get. Should I add anything else to the oils? The diff's a limited slip type.

---

Depending on the fluid brand you purchase you may or may not need to add a friction modifier. I know Redline sells a gear oil with it already blended into the fluid.

If you use a fluid without the FM included, you'll need one 4oz bottle available at your local Ford store.