WELL FOR THOSE WHO ARE INTERESTED, and some may have same problem, had vibration since new finally got this fixed[14k on trk] well the rear end was totally rebuilt...damaged bearings due to bent or defective driveshaft. seems that the 03 drive shafts are fatter alumium than the newer ones, so are more apt to flex than the smaller diameter ones of the 05 ones ,so they installed the 05 one in and after rear end rebuild I feel NO VIBRATION AT ALL,and cab is
quieter too.:ro) there is a tech bulliten on these drive shafts too maybe " d-max tech" knows of this driveshaft problem..............

too ta loo-:t

Your cure is quite interesting, I'm sure some one else will benifit from this info. good luck