Hi, I had this done twice on my 2001 CRD manual voyager. Didn't do it myself as I don't have the facility to manhandle the gearbox out, but I sourced all the parts for my mate who has a garage to do. First time was at 100K miles, small drip & clutch was slipping slightly. Basically there's no need for any special tools, the flywheel bolts can be used to extract the oil seal(s) Make sure you get the 3 part seal kit, not just the outer cover one... you definitely need the O rings. Mine started to leak again at about 160K miles, worse than the original one did, replaced it again and also the clutch, the leak was fixed but the gearbox bearings failed about two months after, so I got rid of it. It's a tricky little job, but once you have the gearbox out and flywheel off it's OK Mat