Hi every one. I tried to find thread with pic about this procedure before go under the car and don't saw any.
So probably it will help to somebody.
I have 1997 jaguar xj6 L with 134 000 miles and little noise in rear end, I decide to change oil first.(I don't think what somebody change oil in the diff before)
Raise the car up somehow (I have little ramp in the garage). Remove drain plug, it is 1/2 inch square on the plug.



I used 5 inch long extension with 1/2 inch drive and 12 point 9/16 socket (15 mm little too big) on ratchet wrench



Now remove fill plug (I think remove fill plug first, then drain oil), on the back right side cover of the differential



I used same 1/2 inch drive 5 inch long extension and breaker bar (ratchet wrench not fit), 3 or 4 inch long extension will fit perfect but I don't have one





Now put something like tread sealer on the drain and fill plugs treads (I used tape) and put oil in diff.



I bought pump to put oil, its very cool tool here: Buy Dorman - Champ 3-in-1 Action Pump 9-2749 at Advance Auto Parts
Pump a lot for one movement and no spillage, I pump it about 6 times and 1 quart is gone.



In my jaguar fit 2 and little more quarts

Here what I used




And good idea to clean the breather too, but I have not found it
Some body know where is it?

After I change the oil in differential noise is gone

 

Thanks , I will add this FAQ .Good thing your diff noise is gone after oil change

 

I probably would have used any other gear oil - other than Lucas...

I am actually using Motorcraft 75W-140 Synthetic Gear Oil in my 96 XJR.
Would have used Castrol SAF-XJ if more easily available in the US.

 

Had the bad luck with castrol engine oil and ford, gm factory brands like motorcraft, acdelco. Sorry but will never use this crap again

 

Nice post, Pan

 

This is out of the Vehicle Care Manual (though it's not specifically stated for my 1996 year model - it's probably applicable to all x300 year models), Page 33:

Rear axle:
Refill - Spec: API GL5; SAE Visc: EP 90; Comments: Use only Shell Spirax Super 90

Top up only - Spec: API GL5; SAE Visc: EP 90; Comments: Alternative brands may be used when Shell Spirax is not available.

 

For the XJR6 and some later models Jaguar actually specified Shell Spirax Super 90 TS (thermally stable) - good luck in trying to find this.. I prefer to use 75W-140 gear oils - many manufacturers (Jaguar, Ford, Chrysler, BMW, Mercedes... spec 75W-140 oils since the early 2000's, including some - such as Ford - back spec'ing it for earlier cars).

 

That's all very true.

But, some people. myself included, do not like Lucas Oil products of any kind. With regard to Lucas Gear Oil, a recent comparison test by Amsoil engineers had numbers showing that it failed to meet specs in a number of areas. Maybe Amsoil has a vested interest, but I doubt they faked the numbers for publication.

 

Isn't that the breather just above the fill hole? Does anyone know if it can be removed to clean?

 

I wish my fill plug was that easy to access. I have some kind of support structure made of heavy tubing that ties into the floor above. It puts a Birdcage Maserati to shame and is right in line with the plug. I'm not sure I can even take it apart without dropping the whole rear subframe.

 

I am indeed blessed. I found the part in the suspension description on the DVD. It's a differential monostrut as fitted to the supercharged manual shift model.
According to the vehicle records it was fitted by the dealer after the owner complained of a shudder problem at high speed.

 

Yes. And it should be always be cleaned to avoid pressure build up which pushes the lubricant out past the seals.

 

Judging by Pan84's choice of differential oil for this write up, I guess I'm safe in assuming that using the black bottle pictured below is OK to use.
I choose the 80w90 over the 75w90 not because of the price difference (the 75w90 is synthetic) but because I'm not sure if the leak will persist after I clean the breather and refill which will likely be in the next day or two. (SEE this thread - https://www.jaguarforums.com/forum/x...ff-leak-57680/)

Should be fine, right?

Thanks to those able to reply, and to Pan84 for the write-up.

 

Take it to valvoline $ 59.99 and its all done....that's what I did today lol

 

I'm using the 80W90 now. When I resolve my diff leak I'll probably switch to the synthetic.

 

This is what I use its expensive but so is a diff rebuild
Red Line Synthetic Oil - Gear Oil for Differentials - Heavy ShockProof®

 

I think a bunch of us are facing the same problem. You say "breather should always be cleaned..". I agree. BUT HOW DO YOU CLEAN THE #$%^ THING???