On20Z--

If your tires are moving up and down you could have either a mild separation, or cupped tires.. which is some what common depending on the tire manufacturer. Check your alignment (caster, camber, toe, etc) to see if its causing the tires to cup. Other than that go to a local tire shop (preferably discount since they do free labor and usually have those hubrings in stock) and put a set in. That should help you. I hope you figure it out.

Dustin, let me know how much you shim it when you figure it out, Im curious to see if thats my problem. as well

 

My truck does the samething with a 4/7 drop. I even put helper air bags on it to see if they would help "Not". I think the problem is that when you do the flip kit you lose the upward tention & travel on the spring because the shocks are not extended enough to do what they are suppose to do.
So this bed shaking is another F'n issue to deal with

 

the center support thing is called the carrier bearing. just bolt it up to the frame incase you need to adjust it in the future.

 

I didn't shim up the transmission, i couldn't get the numbers i wanted out of it unless i put it in a huge bind. With the 4* shims on decel a choppy vibration was present and was real bad. But on accel the vibration wasn't until 90 but was faint then constant by 100. I went to the 3* shim and the vibration starts a little sooner (85ish) then again gets worse, but not as bad as when i started, also now on decel the choppy vibration isn't there. Im still as a loss of what is going on.

Anyone heard of a driveshaft getting weak and bowing under load? I know if they are to long they can, but my RCSB has a pretty short steel one i figured it would do ok.

Dustin

 

I think mine went away a little more dropping the front 2 more inches...

maybe they need a rake to ride right

thats weird, I would think if you go with the lesser of 2 evils that you'll still make a sacrifice but for the most part it will be bearable.

 

Today i measured again.Tailshaft is 6*,DS is 2*,rear yolk is 2*,so im thinking a 4* shim for the rear would help.Thoughts?

 

ordering 4* shims tommorow.
Dustin did you get any better results.

 

No i didn't. Randomly at 70 and i mean at 70 i get a choppy vibration that comes and goes. At 85 i get a moaning vibration that gets worse with mph. I am getting sick of this.

Dustin

 

I did notice my perches the axle sits in have the same length posts,the directions for the kit say they are offset to help pinion angle,so i may trim a little off the front side tommorow,cause i do have the 2*shims already so this will help me get the 4* i need instead of waiting for them.
Mebed shaking problem

 

I guess i was wrong about vibrations i have been experiencing.My father inlaw who is an ex mechanic and his friend who is still and myself jacked up the truck but kept it level so the rear suspension is loaded,noticed the wheels were looking like they were wobbling.Took off tire and noticed hubrings werent flush on the wheels and were causing the wheels to shimmy.Also noticed what 00silv4.8 said and my tires were bucking bad.So we swap front to rears and same problem.We think this set of tires is bad and we atleast kept rings out and they didnt shimmy any more but tures are still bouncy.They are hankook ventus.FML.