Drive shaft vibrations/lowering the T/case ?\'s. 84 Blazer Installed a Rancho 4" lift kit. Front install is fine. Rear was fine until.... Retorqued the fronts and when I started the rear, I see that the u bolts are slanted. The top of the bolts is pointed at 11 o'clock. Turn the axle so the cover was pointed verticle. Then reset everything and retorqued the bolts. I also reversed the spacer / block for the rears. The tapered end is facing rearward. My thinking was that maybe this contributed to the vibration. I did lower the T/case. Rancho makes a spacer kit. I just used angle iron 3/4 of an inch and lowered it. Still vibrations so I added another 1/2 inch and still vibrations. Added another 1/2 inch. No difference. Can't add no more or the distributor will hit the firewall. Any ideas? Suggestions? The angle of the driveshaft should be what? 30 degrees? I tried eyeballing a stock Blazer, same year, and compared the angle to mine and it looks close. Does it matter which way the spacer/blocks face? How can I make sure the drive shaft is at whatever degree it should be? Guesstamate? I did e-mail Rancho and still no response. Thanks!