1996 Ford F250 Centurian Dually

[Jamie]

at 2500 rpm the truck vibrates , i had the clutch and flywheel replaced, and brought it back tothe tranny shop and they replaced it again.. but the vibration is still there.. any idea on what it is? the truck is a 96 ford f250 centurian powerstroke dually 5 speed 4x4.

more noticable under a load then in neutral..

 

[Seabronc]

If the vibration happened after the flywheel replacement, it could be that whoever put it in put the wrong one in. See the comment by BLADE262US at the end of this thread. http://broncozone.com/forums/index.php?sho...685&hl=flywheel

Either direction will cause the same problem.

Good luck,

>-

 

[Jamie]

the vibration happened before the 1st clutch replacement. and then continued. and the flywheel and clutch were replaced again, and the vibration is still there..

 

[Seabronc]

Ok assuming the clutch and flywheel have nothing to do with it, check out the U-joints. I assume they should have done that, but you never know now days.

Good luck,

>-

 

[ocalabronco]

couple things. check your d-shaft ujoints. also, have the balancing on the d-shaft itself checked. sometimes when imbalances reside in two different areas, the harmonics can come together at a certain RPM and create a tangible vibration, like the one you are feeling. are your tires in the rear balanced correctly?

 

[Justshootme84]

You can also try reversing the driveshaft-rear axle pinion yoke where the u-joints mount 180 degreees. IF the vibration is still there, your driveshaft is out of balance or a u-joint or the double cardan joint needs replacing.

 

[STLKIKN]

Not sure of the wheelbase of your truck, but if you have a two piece driveshaft, the hanger bearing could be worn out, that will cause a vibration under load as well.