pretty normal.. try lubing the drive shaft, that reduced my clunking quite a bit, its pretty easy to do, get a grease gun with a flexible hose, a mobil 1 grease cartridge for it, load it up, crawl under your vx and locate the 3 zerk fittings, slide the end of the hose over each fitting and pump grease in until you see it start to come out of the driveshaft near the fitting (if it comes out from the fitting, your arent connected to the fitting properly

here is a video showing where they are

http://www.youtube.com/watch?v=rzaNXz-ty34