Popping sound when I start

[jackboeker83]

https://youtu.be/2uSAFFRSP2A

So after about 500 miles I am hearing a popping sound when I start to drive. I heard it before but not as bad. It happens when I shift and give it gas. I put it on stands and nothing is loose and all the bolts are tight. It doesn't do it when it's on stands but I have narrowed it down to the drivetrain. There is play between the driveshaft and transmission. I know there is supposed to some play but not sure how much is too much. Just wondering if anyone else has had this issue before or can give me some advice. This video wasn't meant to show u the sound so u only need to watch the first part to really hear it.

Coyote with tko 600 with IRS