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???

You need to contact @Dynamic which is our site transmission guru. He'll have the low down on how to make it shift into gear without stalling. 

Mine used to do that when it had about 60,000 on it. I was on a long road trip and would stall out the engine when dropped in gear and hot but not overheated. I started coasting in neutral and go into gear when coasting. Even barely moving helped a lot and not stall the engine. Later it went away after about 5 times doing that.

Does it stall in both forward and reverse?

That's alot of injector ahead of a stock tranny. 

 

I had mine stall ounce with 7x09 injectors not sure if that was before or after I built the tranny. 

I've noticed it kinda lope when I fire it up after I order in fast food drive through then it smooths out. Might be heat thing fuel sitting in the lines add soaking up heat for a short time

8 hours ago, Evan said:

I've noticed it kinda lope when I fire it up after I order in fast food drive through then it smooths out. Might be heat thing fuel sitting in the lines add soaking up heat for a short time

 

I've got the same issue but it all the time near idle it lopes. Launching it lopes and then when slowing down to stop it lopes. Once stopped its smooth. Once rolling its smooth. 

13 hours ago, Dynamic said:

Does it stall in both forward and reverse?

 Yes into any gear. Sometimes it’s not as bad when going into reverse.