Hey all I am a new owner of a nice low miles 04 X-Type and have just a couple questions. I am reading that depending on if I have the early or late model can mean the difference in terms of the transfer case. So my question is how can I find out which transfer case I have and also when is a good time for a tune up? Also does it really matter what oil I use at the end of the day or should I stick with Castrol? Working on getting a owners manual and the online PDF one's are a pain to cycle through.

 

If it is the 2.5 or 3.0 ltr engine it is a Ford engine. I think any reputable synthetic would be fine. Owner's manuals are available on ebay.

 

Jaguar, look on the plate by the driver's door and it should tell you the build date. I believe Jaguar went from the viscous to the non-viscous version transfer case in about March 2004. If you do some searching on here I'm sure you can better narrow down that date.

Tune up? If it is running fine I don't know that i would do anything. Plugs are good for 80K-100K. Depends on how you drive and how the car is used. Intake gaskets would be something you would want to change if you do the plugs. Probably good to change the IMT O rings, brake booster check valve and PCV hose if it is smooth and not ribbed. Those are all very simple to replace and not that expensive and the biggest source of vacuum leaks in our cars. If you know the battery is old you might want to change it. X's are very picky when it comes to the battery.

What I would do is change the fluids out, engine (of course), transmission, rear diff, transfer case. Probably the best thing you can do to help insure a long life to the drive train. Engine oil, as long as it meets or exceeds the Jaguar specs and is the correct viscosity you are good to go. Rest of the fluids if you do a search on here you can find a number of good recommendations.

 

The viscous coupling was discontinued from VIN D56272 in MY2004