This is the classic Freelander symptom of the Viscous Coupling on the propeller shaft failing - which is causing transmission windup. With the VC not slipping the front wheels and the rear wheels are essentially locked with no differential type effect to allow slippage between them. When turning the front wheels turn in a tigher circle than the rears (like the inner wheel turning tigher in a turn than the outer wheel on an axle). Like a differential the VC allows the front wheels (axle set) to turn at a different speed to the rear. If the VC is faulty there is no slip and the transmission system binds (like a normal 4wd vehicle with the transmission centre diff locked) - there has to be some give somewhere and it is usually the tyres slipping on the road - the engine has to provide enough power to make this slip occur - hence at low revs on high grip surfaces the engine may stall.
This is classic VC failure - get it checked now as a matter of urgency, because the IRD and rear diff will fail when circumstances are right - it happened to me 5 months ago. Read the threads on this (I have some going back to late April/May this year) as it is a design problem with the IRD (wrong designed diff ratio) . A new IRD (they have changed diff ratios) or one out of a later model will fix the problem (Expensive). Likewise take the risk and when these symtoms crop up replace the VC - also very expensive.
Garry
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