I had a post a few weeks back on this vibration.anyways i had truck in garage. they fixed some wheel seal and pinion leaks. they also found one ujoint to be tight/stiff/dry and they replaced it with a precision greaseable u joint. the other u joints were said to be good. they also found 2 tires to be out of balance by 6 ounces. all 4 got balanced. now my truck vibrated 90% less but i still feel a kinda shutter between 3rd and 4th when my auto shifts. edge says no tranny slip. what could it be?

 

any1 experience this? maybe its just me because ior weather because its -40 celcius outside.??

 

i wouldnt really say wheel vibration, but feels like stutter in drivetrain somewhere. i doubt engine miss. i have 6-8 psi LP pressure while on highway.