[x300] "High Gearbox Temperature" Warning...HELP!

Hi, I’ve recently purchased a lovely 1998 XJ8 4.0 Auto. The car is
perfcet, been fully serviced by jag and runs silently, just like
new. Only thing, I am sometimes getting a ‘‘High Gearbox
Temperature’’ warning on the dash readout. It tends to happen after
driving the car for over 40mins, then leaving it parked for 10 mins
or so, and then driving it again. The warning usually goes away
after the car has been driven a bit. It came on the other day while
driving on the motorway at 70mph and stayed on till I parked the
car for half an hour. It didnt come back on again the rest of the
drive…a further 4 hours on teh motorway, and appart from for 10
seconds while driving around town the other day it hasnt appeared
since?

Is this something I need to get Jaguar to look at ASAP or should I
just keep my eye on it and see if it comes on more frequently
before having it checked out. The Jaguar Dealer wants �250.00 just
to look at it and check the fluid level…any ideas guys??? The
manual says the gearbox is a sealed unit and the level cant be
checked, but jaguar say it can be topped up, and the level can be
checked but only by them and its a difficult and expensive
job…what a stupid gearbox design!

Any help greatly appreciated.
Cheers,
Alastair.–
1988 XJ40 only 18,500 miles!
Glasgow, United Kingdom
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

HI Alastair,

Did you find the reason for the “High Gearbox Temperature” message you received on your XJ8?

I’m getting one too, and it is kind of odd since it shows up at moderate driving as well as high performance driving.

Kind regards,
Bard Thomas

same issue here,it points to the thermister in the internal trans wire harness,also,it could be a broken external trans wire harness due to excessive movement due to a weak trans mount bushing…good luck