Vibration between 45-50 mph

[FORD-DNA]

I recently installed a icon 2.5" leveling kit on 2012 short bed and 5" NON tapered icon blocks in the rear along with FTS traction bars. ...

I am now experiencing what seems to be a driveline vibration between 45-50 mph, very obvious right at 48 mph. I never noticed a vibration for the first 70,000 miles of ownership. Is it the driveline?

What will make this stop?? I drive the truck 1000 miles per week and it's driving me crazy.

Tapered blocks?

 

[powerstrokinfirefighter]

Did you get it aligned after the lift?

 

[FORD-DNA]

Yes... Sure did.

Forgot to mention, I installed a Icon trac bar as well

 

[florida 6.0]

Did you shim the carrier bearing ?

 

[ToMang07]

Did you shim the carrier bearing ?

^This.

Check u-joints too.

Sent from the pocket porn device.

 

[FORD-DNA]

Iam by no means a mechanic but I'm pretty sure there isn't a carrier bearing. My truck is a shortbed with a ONE piece drive shaft.

I took the drive shaft off yesterday and the u joints seem to be ok, no obvious problems.

 

[ToMang07]

Iam by no means a mechanic but I'm pretty sure there isn't a carrier bearing. My truck is a shortbed with a ONE piece drive shaft.

I took the drive shaft off yesterday and the u joints seem to be ok, no obvious problems.

Did you have a custom shaft installed? Because to my knowledge all the CCSB's have a 2 piece shaft.

 

[FORD-DNA]

No sir, stock drive shaft.

 

[ToMang07]

Well in that case, glad to hear Ford went to a 1-piece.

 

[Motostroker]

I think you need taper blocks bud. Seems these 6.7s are anal with driveline and pinion angles. Do you have a way of measuring pinion angle?

 

[RedRice589]

Did you have a custom shaft installed? Because to my knowledge all the CCSB's have a 2 piece shaft.

2011 and up ccsb have a one pice.

I think you need taper blocks bud. Seems these 6.7s are anal with driveline and pinion angles. Do you have a way of measuring pinion angle?

I would go tapered blocks as well. When I have my airbags jacked up with no load I get the same. I let half the air out and it goes away.

 

[FORD-DNA]

I will give the tapered blocks a try and let ya'll know if it takes care of it. I've seen 2.5degree blocks and 5 degree, anybody have any experience with either????

What degree angle would I be looking for when I measure the drive shaft angle?

Thanks fellas!

 

[RedRice589]

I will give the tapered blocks a try and let ya'll know if it takes care of it. I've seen 2.5degree blocks and 5 degree, anybody have any experience with either????

What degree angle would I be looking for when I measure the drive shaft angle?

Thanks fellas!

Either call Jared with OUO or Trevor at PMF in all honesty. They'd know best.