Ok so I got a 95 f250 7.3 ext can long bed 4x4 and iv been chasing what I feel is a lost cause . Iv been having this vibration / slight shake when I’m drive it can be felt from about 20mph on up to 75 and it turns more into a shake . So I figured to jack the rear end up and put it into drive and it had the same symptoms as when I drive down the road . So I turn the truck off then take the tires off , put into drive same thing . The. I took the brake drums off and it’s still does the same thing ! Iv already replaced the u-joints like 1 month ago and driveshaft support bearing and the rubber . The weights on (driveshaft) I believe are still intact , the phasing is correct for the driveshaft yokes . The carrier bearing is tight . Could it be a bent driveshaft or a transmission mount ???? Any help would really be appreciated I’m loosing my mind with this truck 😤