The owners manual doesn't even mention the differential fluid. Does anyone know what type of fluid it uses?

I read on one thread that it takes 75W90 but I've also seen other weights mentioned.

Also does anyone one know how to tell if your Jag has the old differential or the bigger differential after the recall? I'm assuming that may also be a factor as to which type of fluid to use.

 

Go with the light weight synthetic (75w90), the heavy stuff is for trucks. BE SURE YOU CAN FILL IT BEFORE YOU DRAIN IT. And only put in the Jag recommended amount.

 

I ended up using Mobile1 75w90.


There is no drain plug so I siphoned out the old fluid. The old fluid was thick and dark, it reminded me of crude oil. The magnetic fill plug needed to be cleaned but luckily no big metal shavings.


All in all it took about 20 minutes to drain and refill the diff.

 

My '09 XF has a drain plug......"Props" to you, for going through the ordeal of sucking out the old fluid. If it was that bad, I'd suggest changing it out, again, in a couple hundred miles.


When I changed mine, I used RedLine brand, 75-90 synthetic gear oil.

 

I'd assume some 2009 XF's has a drain plug due to Jaguar replacing the rear diff's on a lot of them with the larger diff due to the issues with the original one.

Thanks for the tip. I'll replace the fluid again next week.

 

I'm not so sure about that.....our XF has the same differential it rolled off the assembly line with. That's not to say that there wasn't a "mid year" change that was implemented by the factory.

 

From what I understand the original diffs (no all) were assembled wrong with some agent inside that wasn't properly removed (don't quote me on that). This error caused for those diffs to leak even after the seals were replaced. Apparently they were NOT recalled but a lot of them that did leak while under warranty were replaced after replacing the seals didn't resolve the issue..


The replacement diffs are suppose to be bigger than the original.

 

There was some discussion here, last year, about the "contaminated" differentials, and that sort of scared me. If I recall correctly, trying to repair or replace the damaged diffs had become a major issue, due to either a lack of parts, or a parts compatibility issue.


Because of what I read, I immediately changed the gear oil in my car. Thankfully, there wasn't a contamination issue with my car. Since I had a drain plug in my diff, after changing the oil, I drove the car around for about 10-15 minutes, and changed it out again, just to be sure.


Good luck with yours!