I’ve gone through this thing as best I can without a complete tear down and rebuild. The truck is a 2013 5.7 66rfe 4x4. I have now 100K on the clock. When I bought the truck I didn’t notice it right away because I don’t hammer on the gas. What I have issues with now is lag/slipping during hard acceleration/downshift. I replace the fluid and filters with OEM, and put in the sonnax valve body complete unit, changed both input and output speed sensors and transducer/pressure switch. The relearn was done correctly. I still have the same issue with no codes. All the parts were changed to fix/prevent a total failure. There’s absolutely no change with all the new parts and no codes/ check engine light. I’m at a total loss here. This maybe the end to my ram days and might be getting rid of the truck. It’s absolutely infuriating because these trucks are great but mopar continues to suffer with terrible transmissions. Wondering if anyone else has this issue that seems phantom.