Variety of possiblities. The first item I would check is the center support bearing. It is in about the middle of the truck and the drive shaft goes into it. The rubber begins to give out and the bearing is no longer supported well causing a vibration.
There were a total of 73,932 Chevy Impalas produced in 1967. Of those, 4,337 of them were four door models.
That would be called a Chevy 307 bored .40 over.
Yes it is i own one
spagettie
The Rate of Change of velocity is - acceleteration
Tires are out of balance ( maybe ) A bad u-joint in the driveshaft will cause it too. Check these things.
A Chevy 305 is not a transmission it is a motor. If you mean a Chevy turbo 350 then the answer would be 3 different forward speeds and reverse.
Tires need ballanced!!!
Tire/wheel balance
how to change upper tie rod on 96 chevy blazer
It may have broken motor mounts.
try new tires and a front end aiighnment.
No. The balance is different, the engine will vibrate.
YES it can, but the engine would vibrate and shake if it did.
Need to check the U-joints in the driveshaft.
not downshifting.
When you're cruising along at highway speeds on level roads.