This is my 1st ls swap anf im a newb at hp tuners. I have a 2001 5.3L with a old design 80e and wondering if the factory settings that the pcm from th 2001 are right for the older 80e? The trans was supposed to be rebuilt from the trans shop I bought it at but it's slipping in 3rd and the shifts feel like a slush box. I took it to another trans guy that I know personally and he says it's getting max line pressure in reverse for some reason. He's going to pull it and go thru the trans, he wanted to look at my hp tuners program to see if anything looks out of scale but didn't see anything. And also I'm getting high voltage code for maf.