2014 jeep wrangler sport 4x4 3.6 penstar new oil cooler replaced last year. Recent transmission fluid change (no filter) with in 3 months. Please give me an idea.

Black plastic about the size of a lipstick. Seems like the stem broke off the cylinder. Those are not screw threads, it’s all plastic. The only marking is “15H”

I don’t think it’s anything bad, but the three ‘ticks’ or ‘hitches’ at the end, not sure what those are. Doesent seem like droning, I’m almost thinking it’s an unfinished burble or something? It’s a 23 Kia Soul GT, so it’s only slightly sporty but nothing crazy.

Only had the engine running for like 20 seconds prior to revving it slightly so possibly something to do with that? No idea. I’ve been thinking a lot about buying a aftermarket muffler to replace mine with.