OK... i been building a truck for a couple months and i never drove it before...

it is a 2003 EX-cab only thing i did to the suspension is a set of 2" shackles...i put a 6.0L in it other than that it is 100% stock and if i take off with anything ove 1/4 throttle it has a vibration you can feel in the whole truck its not HORRIBLE but cery noticible.. what could this be... its really getting on my nerves and don't have the money to just start changing parts..
i want to fix this ASAP!!!!

 

ok i think i need some shims but what DEGREE??? all stock other that 2" shackels what is the MOST COMMON shims for this setup

 

man wish i could help, i did a 3x4 drop on my ecsb back in the day and i never had any type of vibration

have you checked for looseness in the U joints?

 

yea.. i actually took it off, inspected it, and reinstalled it...lol

 

does the yoke look like it may be to far into the tail shaft? are you getting like a shimmer or a solid vibration, lol or is there a difference

 

That would have been the perfect time to measure your output shaft and pinion angles.

 

How do the U-joints look? I don't think that 2" shackles should give you any problems...

 

yep, need to buy you a inclimeter to check the pinion angles, and drive shaft angles. 2pc driveshaft right? is the carrier bearing shot?

 

it is a 2 piece... and the carrier bearing seemed OK but how do i NEED to check it? is there supposed to be any slack or non???

and the vibration is worse harder i mash on the loud petal... but is i had to pick between shimmer or a solid vibration... i would say its a solid vibration...or maybe a shimmy...lol

 

with the DS bolted up you would check for slack in the carrier. if the rubber part is worn out or the bearing is not smooth when spinnig it would be things to look for. but I would look at DS angles, may need a carrier shim to get the DS back in line with the right working angles.