2006 2500 5.9L6 truck was shifting fine with 0 issues. I did a body swap and now I have no codes, but the trans shifts late and harsh and seems to kick down to first right after going into 2nd (only does the kickdown at nearly wot). If I lift a bit it shifts as it should. I have replaced the pressure sensor and solinoid. The weird kick down issue is all new and the actual vs target gov pressure seem to be on track when using a scan tool. Any help would be appreciated.