Since you had to slide it out a bit you should be good. What I'm talking about is when you don't get the converter stabbed far enough into the trans and the converter's input shaft is pressing against the pump inside the trans. My trans guy called it stacking the pump but I don't think that's your problem.
Here's a resource that explains it better than I can:
https://hughesperformance.com/wp-co...orque-converter-installation-instructions.pdf
How far out did you have to slide the converter?
