My range rover has started loosing power. My wife has been using it for the last few months and after getting in last week it struggled to get up to speed. The engine is increasing PRM but the car isnt accelerating too well. What is my first step. How can I test the gearbox , i have heard...

I have owned this car for a year and whilst when it goes its great , when it doesnt its a real dog. Stranded with the family in Scotland , cut out on country roads , leaks everywhere. But after chipping away at them all its still my pride and joy .Even with an electronics background this car...