Daniel9597
Newbie
Hello, I have a 1989 Chevrolet K1500 with a 700-R4 auto trans. In the past few weeks it has developed an odd shaking. Anytime I get above 65-70 miles an hour, the entire truck seems to shake and I can't get it to stop. At first I thought it was tires out of balance, but then it started shaking at other times. It is perfectly smooth until it gets to the top of 3rd gear. Then it'll start shaking and won't stop until I rev it a few times. It also likes to start shaking while I am traveling uphill, and any other time I put it under load, like a fast takeoff from a stoplight. It'll shake, then when I let off the gas and rev it a few times, it'll clear up. Any advice or help is appreciated, and I'll try to provide any other information I need. Thanks in advance.