1994 Chevy Suburban car shakes at 55mph

Hi:
What you are describing sounds like a bad universal joint. They are located at each end of each driveshafts. With the parking brake on so the truck can't move, have someone put the truck in neutral (not running) and grab each u-joint to see if there is play in them.

Let me know what you find.

Joe

[quote:119faa4231="Jacobandnickolas"]Hi:
What you are describing sounds like a bad universal joint. They are located at each end of each driveshafts. With the parking brake on so the truck can't move, have someone put the truck in neutral (not running) and grab each u-joint to see if there is play in them.

Let me know what you find.

Joe[/quote:119faa4231]
Thanks Joe I will let you know I also wanted to ask does this has any thing to do with the 4 wheel drive because I am having problems with that and I think it is my fault if so or not how long can I ride like this

What is happening with the 4wd? does it seem that the vehicle is staying in 4wd? If so, that can cause the vibration too.

Let me know.

Joe

No the past snow storm we have had up here in upstate New York I notice that my 4wd is not working correctly when I switch the lever into 4wd it shakes as if it is on but I still slide all over the place even got stuck a few times. My driveway is on a slight hill so at night I put the parking brake on. One day I notice that the 4wd lever reads put in neutral and apply parking brake I did so and when I tried to pull the 4wd lever into neutral I got a l shock and a noise like I did something wrong, every since the 4wd has not been working right I wonder if this may have caused the shake problem but like I said before only at 55mph

You did nothing wrong. I would suggest having the 4wd linkage checked to see if it is loose and not going correctly into gear. Also, let me know about the u-joints.

Joe

Thanks again Joe and I will