I am still not cured of the vibration. I had to take my wife to Greenville SC to pick up her car and I drove the Monte on Hwy 85 for about 1 1/2 hours each way. I still had the vibration at 70. Kinda un nerving. I need to take it back to the mechanic to check the rearend out after putting some miles on it since the rebuild and I need a list of things to have him check to get rid of the vibration.