Hi, to you all. I'm a new member and a proud owner of a Rangerover DSE 2.5 BMW engine (1998) for the past three years. Of recently this goodboy started to go slow on uphill as slow as 10 - 20mph. It only does better on flatlands and slopes but still doesn't go beyond 70mph. The engine is powerful enough. My doubts are with the gearbox. However, this AUTO Gearbox transmission seems smooth enough as the gears do shift/change and you can feel them shift/change as you increase the speed. Can someone help with where to start. Kindly advise.