(Another) Slip Yoke/Axle wrap question...how to deal with dealership?

Hi all,

Long time listener, first time caller. I actually have been lurking for months, taking in advice before I bought my first Taco. Thanks for all the help (even if you were unaware).

I have done some pretty extensive combing of the forums before I posted this, and I (think) I have got a handle on what the problem I am having is. So I've got around 300 miles on the thing, had it barely a week, and I'm already experiencing the rear end thump/clunk that occurs about 1-2 seconds after I've come to a complete stop. Sometimes it is more pronounced than others, and sometimes it is barely there.

I'm going to take it in to the dealership to just nip it in the bud, but I was going to ask what success y'all have had with different approaches? It's a 2015, does the TSB still apply? Do I just keep hounding them? Is it worth it with it being so low miles so far?

Any advice will be gladly appreciated. I spent a lot of time researching this truck and a week in and I'm already hooked!

Thanks

2015 Access Cab V6 4x4 SR5 6sp, Black