Driveline vibration

[Texan6Seven]

Can someone please tell me what might possibly be wrong here? I have a slight driveline vibration that I can feel as soon as I give my truck throttle. Doesn't matter if it's easing into it or flooring it. Ive tried to shake the drive shaft around in an attempt to find some u-joint play but nothing. The polished area of the shaft is about 5/8".

 

[Swampfox]

What do you have for rear suspension block wise? All blocks will cause axle wrap unless paired with some sort of traction bars.

 

[Kxc]

Polished area is normal on the slip yoke. It's not a balance issue or it would get worse with speed. Sounds like there's misalignment. How much lift do you have ?


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[Jomax]

Single piece or 2 piece driveshaft?


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[Texan6Seven]

I have a 2.5" Carli coils up front, 4.5" tapered block from a '17 250 on the rear to achieve the 2.5" lift out back. I have the 1-piece drive shaft.

 

[sootie]

that is axle wrap. You need traction bars

 

[dsmracing1]

WHS^^^

I put traction bars on and it disappeared...

 

[6.7 Powerstroker]

Up to 3/4" axle plunge is normal. Just the rear end moving.