alright, i just installed a 4 inch rough country lift on my 1990 blazer. it has a very slight vibe from 20-30, but thats liveable. the real problem is that when you take off teh gas at any speeds above 45, there is a sound that is like a loud click or somethin.(kinda sounds like its not set right) im also still ridin on 31's till tommorow. my questions, is this because the shaft is too short( stickin out about 2-3 inches longer that it was) or somethin else. i know its kinda vague, but if you need to know anything, tell me and ill answer. thanks in advance.