this weekend i put a 2 1/2 in. suspension lift on my 88 blazer. new front and rear springs and shocks and tires. since then i have had to grind down the slip yoke on my rear drive shaft due to it hitting, and i have dropped my t-case 1". my rear driveshaft is still vibrating though. i thought with that small of a lift kit that i wouldn't have these problems. anybody have any idea as to why i'm still getting vibration and the yolk still slightly cathes the driveshaft if i take off hard from a dead stop. any help would be appreciated.