I just finished installing a ORD 4 inch shackle flip with 4" front springs and took it out for a drive and holy chit! This thing has such a bad vibration it could rattle your teeth out, it starts right after you start moving and doesnt seem to calm down at all till you get up around 40-45 and it still does it then just not as bad, oh and it prettty much goes away if you let off the gas and coast. Does this sound like it could be a drive shaft issue, it would hafta be the rear since the front one is not on right now. I talked to someone at ORD and they didnt think it would be the driveshaft with only 4"s of lift but I dont know what else it could be? Oh and do you guys think the stock front driveshaft will be sufficiant with a 4"? Thanks for any input.