What year is it. We had a few problems with the earlier ones, pre about 03, which we believe were down to wading regularly through water deeper than the recommended wading depth.
Mine's an 04, been in deep water, but not often, gearbox fine at 80,000 miles.
A good choice, they are far nicer than the manual, especially off road. Keep an eye on this site, they are not all as reliable as they should be, and there is some good advice here, but don't get paranoid, there are plenty of good ones about.