98 buick suspension prob.

my 98 buick le sabre 3.8 starts to shake badly once i hit the 80 + km on driver front side, and it feels like something loose. but it drives ok from 0 to 77km this just recently happend i took tire off and looked at driver side front end and everybthing looks tight there no play on bearing ball joints look ok.i wonder how do you check cv shafts. has anybody have any suggestion please thanx

Put the tire in the back see what happens.

Put the tire in the back see what happens.
I changed tire from front to back and the shaking went away thanx for fast reply maxwedge

That tire has belt shift, also replace it.

That tire has belt shift, also replace it.
what does belt shift mean? and it rides good with it at back is the tire coming apart? thanx

Based on what you describe the tire has a shift in it's internal stucture, if you spin the tire you should see a wobble.

I agree with Max, you need to look at that tire... If its that violent at that speed( pretty low speed ) there is a great chance that it has nothing to do with a wheel weight.... But like stated a shifted belt or a belt that starting to separate... Get it checked out ASAP