So I have a 99 24 valve Cummins with 7x14 injectors, bigger-ish turbo, delivery tubes, and lift pump and no tuner on it. When I shift into any gear when the truck is warm it feels like the truck either has to much load on it or tries to overcompensate and it just stalls out. The Tranny is stock. Was told it has billet converter but I’m not positive. It only does this after the truck has been running at operating temp. First start up in morning it shifts fine no issues. Any ideas???