Vibrations After Flip Kit

[Slow05CC]

So this weekend I installed a flip kit on my 2005 crew cab Silverado! Looks insane, but has a vibration ( go figure right? )

I have a 3* shim in it right now and there is not vibration while city driving ( as far as I can tell anyway ) but there is a vibration at wide open throttle from around 4000 - 5500 rpm, and a vibration at 80 plus.

The WOT vibration is really bad, like a shudder. The vibration at 80 plus feels like a cell phone on vibrate ( maybe not as bad but noticeable ). Other then that the truck rides amazing!

I am running a 3/5 drop with 265/50/20 on 20" Centerline Snipers
The rear is flipped with adjustable hangers ( 4 & 5 Inch ) on the rear of the leaf spring.
The front is Spindles and coils
Ground force shocks on all corners with extensions on the rear

Any help is greatly appreciated!!!!!!

J.

 

[2005_Silverado]

Same thing I get on mine....havent been able to get rid of it and its been like that for years now

 

[bgray]

Unless you have proper driveline angle measurements there is nothing we can do for you.

IT just needs to be setup properly. my CC at 4/6, 5/7, blown has zero vibrations ever

 

[Slow05CC]

I just ordered a measurement deal from summit so this weekend I will see what it is at.

We noticed the nose of the rearend tends to sit up a bit so I am guessing it needs more angle on the shim. I will eventually figure this out cause it will bother the hell out of me

 

[2005_Silverado]

Its VERY annoying trying to drive 75-80 and you feel/hear the damn thing vibrating.

What did you order? Harbor Freight has a digital angle finder thing that seems like would work. I think Tremec has an app to help you determine you pinion angle as well.

 

[bgray]

MAke sure you measure off the U joint cap from the U joint on both the trans output and rear end yoke

 

[2005_Silverado]

MAke sure you measure off the ball joint cap from the Ujoint on both the trans output and rear end yoke

ball joint u say

 

[bgray]

lol

 

[2005_Silverado]

u canadians got some driveline tricks up ur sleeves, eh?

 

[bgray]

"y'all" know this

 

[Jared]

i st my BT flip up with their shims and I never had vibe issues except for 90mph or more, and that was simply the driveshaft, and it did it before the drops

 

[Slow05CC]

Thanks for the help guys! When my angle tool comes in ill see where it is and hope I can solve the problem with a bigger angle shim.

Now if I could just fix the chevy lean and get rid of the vibration... Oh, and roll the fenders, then mini tub the front... Ohhhh the lowered life frustrations