You might find this of interest.

http://www.fullfatrr.com/forum/topic20319....rbox+modes

We had the same issue with ours not long after purchase. We had to change the radiator and gearbox oil cooler. The bottom 6 cores of the radiator collapse internally.

Land Rover issued a Technical Service Bulletin in September 2007 for "High Engine Speeds and/or Transmission Shift Problems" which stated :

"The customer may experience high engine speeds and/or transmission shift problems after driving for 25 minutes or longer. There may also be the possibility of the transmission overheat message being displayed on the instrument cluster. High transmission fluid temperatures may be the cause of the problem"

In other words the transmission is selecting 'cooling strategy' mode as the bulk oil temperature has exceeded 140 deg. C.

The fault is caused by a partial blockage in the lower eight tubes of the (engine) radiator which supply coolant to the transmission oil cooler - supposedly caused by "depletion of the coolant corrosion inhibitor".

The bulletin states that it's not possible to clean out the partial blockage and that the radiator must be replaced.

LTB00080 - 15 Aug 2007

VIN Numbers 100042-175505

Well got the car back today, done about 40 miles and drives like a different car, had a new gearbox cooler, and modified thermostat, new engine radiator and gearbox xy switch, coolant change and regassed the aircon whilst there.
All for a bargain £1200

To be fair that quite reasonable price for the work welcome to Range Rover ownership.. most bills will be near the 1k mark .. if your lucky..

Glad it's all sorted for you, hopefully your enjoy some happy motoring now

Cheers 2003 Range Rover 4.4 Litre V8 - Adriatic blue

2003 Range Rover 4.4 Litre V8 -Maintenance History Click Here = http://www.fullfatrr.com/forum/topic39687.html

Yeah I know it was reasonable for the work carried out. Just need no more problems for a while.
Still love the car.