2.5 l auto diesel 1999 t reg range rover - driving along - - 35 mph - suddenly started revving even though in gear - pulled over - wont engage gear at all - just revs - no history of jerking / jumping / slipping etc - any ideas - been with garage since last thursday - tells me needs to pull everythingout to diagnose problem - says prob needs recon box fitting - nightmare - no pennies - just lost kidney- 13 months off work - help !