Driveshaft Replacement?

That's exactly what I did to mine had to press out and snapped the cap

 

does the new prop shaft on this come as an assembly With the U-joints already installed on?

 

From what a service tech told me, it sounds like it does.

 

How likely is it that I had a weight fall off or there is an imbalance in driveshaft? I do not go off roading. I do drive up a bumpy dirt road often.

The shudder I am having is very similar to the beginning of my CB going out last year, but the problem is changing the CB left a slight shudder that i never had before.. so wondering if I got a defective part and it cause my U joint to fail sooner than later.

Any thoughts on this?