Weird vibration, I think front

[62MaxWedge]

At 65 mph+, it feels as though the steering wheel is going to come out of hands at times. The rougher the highway the worse it gets.



I've replaced the upper control arm bushings (NAPA), replace the center drag link (as it was worn out), lower ball joints are good and tight, just replaced the front tires (BF Goodrich on all six), and still there, better however, still present.



In doing a search on shocks, I found my truck has GAST front and rears and I'm concerned these shocks are too stiff and are causing the tires to "slap" the pavement.



Anybody have any input?

 

[dpuckett]

How about upper ball joints and lower control arm bushings? Any mud on the inside of the front wheels? Had mud inside the wheels of my mom's (she NEVER takes it to a car wash); caused it to vibrate somethign fierce. I know this is kind of a dumb question, but how were the tires balanced? There are 3 or 4 different ways to balance them that *I* know of. HTe best I have found is the computer balancer, where it spins the tire up to about 50-55 mph, then tells you where to put the weights- in/out; how much. Check for loose lug nuts. If you exhaust all other possibilities, have the shop check for water or other debris inside the tire. Mom had a tire one time that had about an ounce of water in it, made it vabrate real bad for a while, then be ok a while, then bad again. Good luck chasing the gremlins. I have been lucky so far, I guess- no real complaints, except the truck gets to feeling a little "gutless" now and then.....

Daniel