I have recently acquired a 2005 X Type 3.0 AWD model from a family member and driven it twice in the last 3 weeks. Service records are very minimal. The car has just over 76,000 miles on it, there are no fault indications I recall on the instrument panel and I haven't had any kind of computer diagnostic checks performed.
The car starts and runs however there are 2 problems. The gearbox shifts smoothly up to 4th however it will not shift into 5th. The second problem is a low pitch driveline hum or whine.

Some limited searching in the forum and on the net seem to indicate lack of transmission and transfer case fluid changes. Am I on the right track? Any guidance would be appreciated.

Ed

 

It would certainly help if you were to get the fault codes read, preferably by scanner that reads Jaguar specific codes as well as the normal generic ones.

There are a number of faults that can cause the transmission to stick in 4th gear, each with their own code, but a few are the result of bad wiring connections between the Transmission Control Module and the other system modules. It might be worth you checking the condition of the connectors to the TCM that is located on the lefthand side A Pillar.

It would certainly be good to change the transfer box oil as is described in various threads on this section of the Forum. The correct Jaguar spec is 75W 140 Limited Slip Differential oil - despite the fact that it is an open diff, not an LS.

If you drain it on the level through the fitted plug point in the side, there will be 250 mls left in the bottom, so put only 350 mls back to bring the total up to 600 mls. If you overfill it, it will blow the excess through the vent on top of the box and look as though the righthand driveshaft oil seal is leaking!

The attachment will be useful to you, but draining through the oil seal as shown still leaves 200 mls behind! Not really worth the bother IMO

 

EMD, the hum that you are hearing is probably most noticeable at 60-70 mph. If so, the noise you are hearing is the carrier bearing on the rear driveshaft. If you get under the car, you will see the bearing in the middle of the rear driveshaft. Get yourself a grease gun with some termalene grease in it and a needle attachment for the hose of the grease gun. You can then slide the needle into the bearing and add some grease. You will want to do this in 3-4 places (evenly spread) on the bearing. That should solve your noise issue.

As for the shifting, are you thinking that the RPMs are a little high for a given road speed? Keep in mind that this car is geared a bit differently than most. If you are turning around 2500 RPM at 70 mph, then that is about right. What sort of RPMs are you turning at say 60 mph. We can then check to make sure you are just not missing something obvious.