I have a 97 1500 with 119000 km that has a vibration that is intermittent( vibration / more of a bounce) at speeds from 75 kmph to 130 kmph. I have verified my U-joints they are good, flipped the drive shaft 90 degrees, moved my rear wheels to the front, replaced the oil in the front and rear diff as well as did a visual inspection, no sign of abnormal wear or metal filings. This problem does not seems to be getting worse but is very annoying.
At a loos on what to veridy