hello to all readers
my 92 full size blazer just started vibrating on accel between 40 and 55
it stops when i let off throttle
i dont feel it in the steering wheel
but i can feel it through the shifter for the transfer case
i checked u joints
the front are bad so i pulled front shaft
vibration is still there
Any thoughts
thanks in advance

Your driveline may be out of balance. Check to see if the weights are still on it.