I've got about 2K miles on my '06. When I first bought it the clutch operation (taking off) was smooth for the first 200 miles or so. Since then it is very "grabby" while letting clutch out taking off. Once I get going it is very smooth (no shutter). It seems worse when backing, it will actually start hopping while backing a trailer on gravel. Anybody else having this problem? Everything else is good (getting about 18-20 MPG, 35% city/65%hwy). Appreciate the help.