Seems I am getting a vibration 40-50 mph that goes away when accelerating, but at any speed on and off the gas it vibrates. I have did numerous searches and the out come was u joints .After this install the shop who installed the gears and test drove the truck took it to a 4x4 guy that stated the pumpkin angle will have to be changed inline with the transfer case .(guy has been in business for years)The 6 inch suspension lift is by skyjacker . I have not had time to check u joints , other than moving side to side and I feel the proper way is actually removing the whole shaft. Just wanting input from those who have re geared and installed a 6 inch lift ,opinions. I know it has been stated in this forum before, that the 6 inch lift is fine with the stock shaft and anything over would need a different shaft.The truck had no vibration with the 355 gears and the 6 inch lift . Thanks TR

 

Update -- any one considering a lift --good info @ tom woods drive shafts . The 488 gears are turning faster in my bronco and the angle of the shaft is 24 degrees. My xfer case is at 5 degree and the pinion with 4 degree shims 10 degrees leaving the true angle of the shaft at 14 degrees. manufactorers like 7 degrees.(pretty conservative ). This website is pretty educational about lifts and vibrations, Now it time to re shim , already had both drive shafts re built and re balanced .

 

great info here. I know my pinion isn't at the best angle either and needs to be messed with. hold onto the shims you have for future. let us know what shim you went with