95 YJ Sahara Shakes N Sputters

I have a 95 YJ Sahara and Love it!
It has 86,000 kilometers

When I am driving it shakes when I am accelerating between approximately 40 and 50 miles per hour or 50 and 60 kms. per hour. It doesn't do it at any other time.

I don't know what would cause this.

I have had the fuel system cleaned, but I have not changed the filter.
I am going to change the filter but I am wondering if there is anything else taht could be causing this problem as i am worried that this could cause larger problems if it is not fixed soon.

it could also be your tires aren't balanced properly, had that same exact problem.

I found the problem

U Joint was shot

Fixed and running smoothly!!!