I lifted my 79 k5 6" and less then a week later the front u-joint on the rear driveline broke. I replaced both joints on the rear shaft and the next day it made kinf of like creeking noises coming from the driveshaft, they sound similar to the noises that it made right before it broke the 1st time. ive noticed it vibrates when im on the gas. what have people done? im afraid that its about to break again and dont realy want to deal with it again. thanks for any help.