Here's a quick test for a bad Watts link bushing with a video showing a bad bushing.
Symptoms
When you have a Watts link bushing going bad, normally you will hear a clunk and a bunk from the back of the truck when you go over bumps or from forward to reverse. The truck will also not want to track straight on the road and feel very loose.
Instructions.
Get your biggest friend to push on the truck side to side on the body right next to the rear taillight. We did driver-side to passenger side in this video.

Now climb under and see if there is any play in the bushings.

 

Now that is a good video.

 

LOL!!!!!!

Your ok in my book.

 

More importantly, you should add to the video(or here, or wherever you post this) symptoms of a bad watts bushing. Like a clunking sound while turning/ swaying unnaturally.

 

Look UP
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line 3

 

well then, nevermind!

 

Good video Justin!

 

Thank you

 

AHA!!! Testing will ensue