tedjackl

feel shaking in every thing ,shift stick(auto),seat steering car body the whole car starts to shake

hi all i own a 1987 gl wagon 4wd. two yrs now! about 15 times now , at speeds of 80kms to 110kms the car starts to shake and vibrate like crazy. letting the gas off and then continuing has fixed the problem. the last couple of times it happened the shaking continued even after let gas off and as well as slowing down and pull over to side of road.never does this at lower speeds yet! the best way i can descride the shaking is like a belt in tire seperating or bent rim but of course i have checked all tires and rims out , not the problem. any suggestions of what i can check would be appreciated. thank you all