Ok so I just replaced the upper and lower ball joints on the passenger side as well as upper a arm and upper and lower balljoint on driver side. At about 60-65 mph it has a shimmy but only at tht speed. Any ideas as to why?

 

Hard to say for sure, but I would check sway bar links and bushings. They can cause a shimmy at highway speed that wouldn't be evident around town.

It's also possible it could be a steering related issue, but I would suspect you would notice that around town as well.

Did you get an alignment after replacing the a arm?

 

Alignment and tire balance are the first things that come to my mind.

 

You didn't say anything about your vehicle.

If this is 4-wheel drive, then did you also check your u-joints in the front axle?
You would think if one was going bad it would show all of the time but it could be a joint that is starting to dry out and catching at speed.