Just went through a real trial with fixing a vibration that turned out to be the driveshaft on a 96 F350 long bed crew cab so it is a 2 piece shaft.
Vibration had been getting worse for some time...changed the center support, no difference. Replaced the U-joints, no difference. Spline joint good.
Took it to one driveshaft shop that was stumped...told me I just needed to replace the whole thing.
Took it to another one- they took off most of the factory weights, took off the rubber damped heavy steel ring on the pinion end and welded on a washer for a balancing weight on the front shaft.
Smooth as can be now..just can't understand how it can get unbalanced in the first place!
Vibration had been getting worse for some time...changed the center support, no difference. Replaced the U-joints, no difference. Spline joint good.
Took it to one driveshaft shop that was stumped...told me I just needed to replace the whole thing.
Took it to another one- they took off most of the factory weights, took off the rubber damped heavy steel ring on the pinion end and welded on a washer for a balancing weight on the front shaft.
Smooth as can be now..just can't understand how it can get unbalanced in the first place!