Differential Oil

[UTME]

Would this work in rubicon?

https://a.co/d/cuzQONi

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[Radioman]

Would this work in rubicon?

https://a.co/d/cuzQONi

My owners manual says:
Front diff 75W85 GL5
Rear M200 75W140 GL 5
Rear M220 75W85 GL 5

My Rubi came with M220 rear diff. I would use the Valvoline show as long as it is listed as GL 5.

Along with discussion of motor oil, tires, etc., there will be others that disagree but I would use the 75W90.

Edit; I would use a synthetic 75W90 from Mobil 1 or Pennzoil, etc. in addition to the Valvoline.

 

[roaniecowpony]

If you have oversize, non-OEM tires, consider using what the axle manufacturer recommends, to get the maximum load performance that Dana specifies. If your jeep is stock and you use it lightly, carry on with the light viscosity gear oil Jeep recommends.

 

[UTME]

Interesting northridge sells the Dana diff covers with royal purple 75w140

 

[DRVMN]

If you add differential oil with friction modifier and your Jeep does not have the limited slip differential, will it hurt anything other than you maybe paid more for a higher end fluid that you didn't need?

 

[autotragic]

Count me as the odd man out: I stick to OEM recommended spec and use Redline 75W-85 GL-5 gear oil front & rear in our Rubicon and Amsoil SG 75W-85 GL-5 gear oil front & rear in our Grand Cherokee.

The problem is when you say OEM recommended spec...

Which OEM are you referring?

For instance if you listen to Jeep and the owner's manual they'll tell you that you're automatic transmission has lifetime fluid but ZF who designed the transmission says it needs the transmission fluid changed at 60,000 miles.

Same deal with the axles, I'll continue using 75W140 in both axles because that's the Dana spec not Jeep's fuel economy spec.

When you say OEM this distinction matters.

 

[Kracka]

The problem is when you say OEM recommended spec...

Which OEM are you referring?

The one that makes, sells, & warrants the vehicle.

 

[autotragic]

The one that makes, sells, & warrants the vehicle.

Jeep didn't make your vehicle though they just assembled it that's what I'm getting at here.

If you want to listen to Jeep fine but I'm going to listen to the actual OEM not the assembler.

 

[jadmt]

The problem is when you say OEM recommended spec...

Which OEM are you referring?

For instance if you listen to Jeep and the owner's manual they'll tell you that you're automatic transmission has lifetime fluid but ZF who designed the transmission says it needs the transmission fluid changed at 60,000 miles.

Same deal with the axles, I'll continue using 75W140 in both axles because that's the Dana spec not Jeep's fuel economy spec.

When you say OEM this distinction matters.

I contacted Dana Spicer and they told me to follow jeep's recommendations...

 

[jadmt]

If you add differential oil with friction modifier and your Jeep does not have the limited slip differential, will it hurt anything other than you maybe paid more for a higher end fluid that you didn't need?

no it will not hurt anything.

 

[Kracka]

Jeep didn't make your vehicle though they just assembled it that's what I'm getting at here.

If you want to listen to Jeep fine but I'm going to listen to the actual OEM not the assembler.

Yes, they assembled it after all components were made to their spec. Their spec calls for 75W-85 and as noted above, Dana says to follow said spec. Spec after a rebuild is a different story...but that's no longer OEM. Much like how a built engine needs a different weight oil vs. stock.

 

[mwilk012]

Count me as the odd man out: I stick to OEM recommended spec and use Redline 75W-85 GL-5 gear oil front & rear in our Rubicon and Amsoil SG 75W-85 GL-5 gear oil front & rear in our Grand Cherokee.

The OEM of the differential or of the vehicle? Why?

 

[Heimkehr]

If you add differential oil with friction modifier and your Jeep does not have the limited slip differential, will it hurt anything other than you maybe paid more for a higher end fluid that you didn't need?

No, nothing will be harmed. Ring and pinion gears will be present no matter what, meaning the friction modifier would have to be compatible with them no matter the presence, or not, of LSD hardware.

Many over-the-counter gear oils have the friction modifier as a default ingredient.

 

[DRVMN]

No, nothing will be harmed. Ring and pinion gears will be present no matter what, meaning the friction modifier would have to be compatible with them no matter the presence, or not, of LSD hardware.

Many over-the-counter gear oils have the friction modifier as a default ingredient.

Thank You! That makes sense and I appreciate your explanation!!!

 

[wanderer]

What about in hotter? Weather is a 75 140 better say temperature ranging from 80 to 100+ ??

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