Differential oil change

[Rhinebeck01]

Thanks again to both of you.

@Gmanjeeper

@CarbonSteel is an excellent resource in regard to this topic... You can also take to the bank the info he spews in regard to fluids..... motor oil or diff fluid..

The forum is fortunate that this guy is into this stuff so to speak.... and takes the time to pass on the very current knowledge he has...

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[Tncdrew]

@Gmanjeeper

@CarbonSteel is an excellent resource in regard to this topic... You can also take to the bank the info he spews in regard to fluids..... motor oil or diff fluid..

The

I have great confidence in that spew! ?

 

[Gmanjeeper]

@Gmanjeeper

@CarbonSteel is an excellent resource in regard to this topic... You can also take to the bank the info he spews in regard to fluids..... motor oil or diff fluid..

The forum is fortunate that this guy is into this stuff so to speak.... and takes the time to pass on the very current knowledge he has...

Based upon what I have read, I very much agree with you.

 

[grimmjeeper]

@Gmanjeeper

When you pull the diff covers and are in there looking, inspecting, cleaning, etc., do not use Brake Cleaner, other chemicals/solvents, etc. inside the housings, on the thread holes, etc..... Wipe/clean up with lint free, clean rags.

Curious why you wouldn't use a cleaner/solvent.

 

[Rhinebeck01]

Curious why you wouldn't use a cleaner/solvent.

Being overly cautious some may say.... but .... I (other's I have know feel the same as me) worry that the solvent /chemicals/cleaner or the remnants of the solvent /chemicals/cleaner may have/will have a negative impact on the thread sealer or Teflon tape on plugs, gasket, thread locker on cover bolts, fill fluid.

 

[grimmjeeper]

Being overly cautious some may say.... but .... I (other's I have know feel the same as me) worry that the solvent /chemicals/cleaner or the remnants of the solvent /chemicals/cleaner may have/will have a negative impact on the thread sealer or Teflon tape on plugs, gasket, thread locker on cover bolts, fill fluid.

Yeah, I hose mine out. I like to make sure any grit or milkshake is washed out. I drain and clean first which gives it time to evaporate while I'm doing my inspection. Brake cleaner evaporates fast. Faster when you blow it out with compressed air.

 

[RogerDorn]

Afternoon
I have a 21 rubicon with the trailer package but just put in 75w90 Royal purple in the rear. Is that ok if I don’t tow anything and have highway driving or should I drain and put in 75w140 now or wait until I change in 15,000 miles or so?

 

[Rhinebeck01]

Afternoon
I have a 21 rubicon with the trailer package but just put in 75w90 Royal purple in the rear. Is that ok if I don’t tow anything and have highway driving or should I drain and put in 75w140 now or wait until I change in 15,000 miles or so?

Since you're not towing it's ok.

 

[grimmjeeper]

Afternoon
I have a 21 rubicon with the trailer package but just put in 75w90 Royal purple in the rear. Is that ok if I don’t tow anything and have highway driving or should I drain and put in 75w140 now or wait until I change in 15,000 miles or so?

You're not going to really hurt anything. The 75w90 is adequate. The 75w140 is better.

 

[stumblinhorse]

Afternoon
I have a 21 rubicon with the trailer package but just put in 75w90 Royal purple in the rear. Is that ok if I don’t tow anything and have highway driving or should I drain and put in 75w140 now or wait until I change in 15,000 miles or so?

If you, like 95% of all wrangler owners, took it to the dealer for the change, 75w85 would be all you would get. So your 75w90 will be fine.

 

[RogerDorn]

You're not going to really hurt anything. The 75w90 is adequate. The 75w140 is better.

Thank you
About how many miles before I should change it and when I do should I switch to the 140

 

[grimmjeeper]

Thank you
About how many miles before I should change it and when I do should I switch to the 140

You can run it for a regular service interval. It's what comes stock in the diff and you basically never hear of failure due to viscosity issues.

I run 75w90 myself and have no problems. I may have to replace bearings at 200,000 miles instead of 300,000. But that's not a huge concern for me.

 

[MatthewAMEL]

Why aren't we just following the specs from Dana?

When I did the locker sensor potting, I followed the Dana specs for everything.

https://www.jlwranglerforums.com/fo...orque-and-tqtr-specs.22854/page-2#post-710999

 

[Gmanjeeper]

Why aren't we just following the specs from Dana?

When I did the locker sensor potting, I followed the Dana specs for everything.

https://www.jlwranglerforums.com/fo...orque-and-tqtr-specs.22854/page-2#post-710999

You can run it for a regular service interval. It's what comes stock in the diff and you basically never hear of failure due to viscosity issues.

I run 75w90 myself and have no problems. I may have to replace bearings at 200,000 miles instead of 300,000. But that's not a huge concern for me.

Interesting topic. I am headed to my dealer for some warranty work on my 2022 JLR. (There is a burbling or chattering noise and the dealer says it is coming from the rear end). The dealer is going to inspect the gears etc and when they put the rear end back together I am going to have them put on a DAna Advantek HD cover. Because it is a DNA M220 rear axle vs a Dana M220 rear axle, I am pretty sure they will want to put the MOPAR 75w 85 gear oil in. Should I have them put in 75w 140 even if I have to either pay an up charge or furnish the oil myself?

 

[BDinTX]

@Gmanjeeper - personal opinion:
If there is a potential for something to be wrong inside the differential housing I wouldn't put anything but what the factory recommends. I'd probably hold off on the new diff cover too. We've heard too many horror stories of people getting warranty work denied for the lamest of reasons. Only after it has been resolved would I change it out to 75w140.

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