Look in the Drivetrain and Transmission forum, been covered extensively but the short of it is, the R33 sender is on the other side of the shaft (so gear is cut the opposite way, explaining why it has smashed your R32 sender). You need to get a Navara sender and either graft a 33 cog on there (so the ratio stays similar) or live with the speedo being out a bit.
I just used the Navara sender and cog (17T) as with my different final drive gears the speedo only reads 10kmh high which isn't a bad thing