anyone have a copy of this TSB-38A dated 2/22/73? Deals with light truck vibration in 73-74 F-100. maybe others. I'v tried all the truck forums that I know of and google. I have had vibration problems in two of my trucks a 74 & 79 comes in around 55mph and up , tried all the known fixs, like balance driveline, tires, axle alignment etc. I found about this TSB in a 74 issue of popular mechnics, where someone wrote in trying to get answers to vibrations in his 73 that he bought new and the dealer could not seem to fix. he was told to check out this TSB. I guess the dealer didn't know about it.