What differential fluid do you guys recommend to use? what brand does Jaguar use?

 

I use Redline 75w/90shock proof synthetic. Jag recommends whatever you can only get from the dealer $$$$$..lol

 

I used Royal Purple 01300 Max Gear 75W-90 High Performance Synthetic Automotive Gear Oil. I think you'll be fine with anything as long as it is long life synthetic 75W90....

 

perfect, exactly what I needed. Thanks

 

You are ahead of the game by changing the rear diff fluid. Not many people even check the level!
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you're giving me more credit than I'm worth. I didnt realize you can check the level haha. i will talk to my mechanic about checking the level. if its lower than normal, hopefully adding more will cure the chattering problem from the back

 

With my dodgy pre R41865 diff it's become my life's mission to ensure my diff is always full of fluid lol.

 

I would say this....if you're going to the trouble of getting the car up in the air, to pull the "fill plug" and check the oil level, why not invest another half hour, or so, and change the gear lube? The hardest part, at least in my opinion, would be getting the car up in the air. Once you're that far, it's just a matter of removing the drain plug, letting the old lube out, and pumping in some fresh oil.


When I changed out mine, after hearing the scare about contaminated XF differentials, I, too, refilled it with Red Line's synthetic lube.

 

That's a good point and one I forgot!
Yes please change it anyway.
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The spec is in your owner's manual. Any fluid that meets this spec will be suitable.