Help! problem with 4 wheel drive vibrations/squeeking
 

HI i have a 2004 ford f250 6.0 diesel i just put new warn locking hubs on it as well as the cv centering ball seat and all new u joints in the front drive shaft every time i put the truck in 4x4 i get a slight vibration in the front end area under acceleration and a squeeking rubbing sounds when braking at lower speeds, and this does not occur when in 4x4 and hubs unlocked or in 2wd. can any one help me figure this out Thanks!

my under standing is when the truck is in 4x4 but no hubs locked everything spins but the wheels which would mean the squeeking would be coming from the hubs but they are brand new. Makes no sense to me:confused:

hey i out the same hubs on my 03 7.3 ever since my tires are saw toothin ive swapped brake parts all new front end parts. and i vibrate at 40-50 mph. even worst when i im braking either 70mph to 5 mph it doesnt matter. i put on new shocks and going to rotate the tires. it seams all my probs started when i put this new leveling kit on my (repairs my self )ive just starting to run out of things to replace and fix and still have my prob too....

worm0479