I got this vibration that shakes the whole truck at about 2-5 mph i hate it i think i have a half shaft going bad it only at certain point of the revolution.

 

That may be due to phasing at the driveshaft at low frequency, under loading, when taking off etc.

Then, it smooths out once it's passed through that frequency range. Have the driveshaft checked for an out of alignment or, out of balance condition.

CM

 

went to find out that i need a track bar and ball joints

 

No kidding. When mine went out (track bar) it just clunked away. When my ball joints went, it was sloppy, clunky and loose feeling but, never shook the whole truck. Interesting.

CM

 

well mine are so bad that the move a total of 1/4 up and down do might set bad angle for half shaft u joints