Truck will all of a sudden start a vibration out of nowhere..regardless of what gear it is in..(5 spd tourqueshift)..but i will hit a bump in the road then it stops until the next bump..i feel it in the driveline but does not appear to be a trans issue..stops when i stop completely..my center drifeshaft support bearing has 1/8 -1/4 in play in rubber grommet around bearing..u joints seem fine🤔🤔..has anyone had a similar exp? I will prob change out support bearing since they are reasonably priced..any other suggestions?? 03 f350 4x4 with 143,000 miles

 

Check all bearings, joints and shafts,
It should not look like this

 

my u joints are tight..no slop at all from them ..just 1/4 in movement from rubber bushing on carrier bearing..nothing like that video..thats scary

 

Good to check ball joints, wheel bearings, tie rod ends too

 

A vibration can occur under load from a misfire caused by a faulty injector or wiring chafe for examples.
Did you check for codes using Forscan or a quality scanner?

 

i keep tourque pro on whenever i drive..i have had no misfires according to it..i scan fault codes regularly ..just weird it starts out of nowhere then stops when i hit a good bump in the road

 

Checked everything under truck on driveline..all is tight..scratching my head..still only thing is driveshaft support bearing play..but not much

 

Have you already jacked up the front axle and tried very hard to tilt the wheels along the vertical axis?

 

no sir not yet..will try that soon..hopefully today..