Possible drive shaft vibration

[gtkid]

So I get low frequency vibration around 30 mph, I can live with it but could this possibly cause any kind of damage. They had to reinstall the driveshaft after some mods. They claim the noise/vibration is from the new poly bushings

 

[stkjock]

is the car lowered?

has the pinon angle been checked?

have you tried indexing the DS?

 

[gtkid]

is the car lowered?

has the pinon angle been checked?

have you tried indexing the DS?

Car in not lowered but i do have 28" Drag radials. I had the drag radials on before the mods and had no vibration. I would assume the shop would do all those things?? I can live with it as long as it's not hurting anything

 

[stkjock]

don't assume.

if the DS was no installed in the same position as prior that could be part of the issue. I'd ask if they marked it and reinstalled in the same position.

the pinion is unlikely to be the issue if the car is not lowered.

added NVH is common with suspension upgrades