I have a everest with 2.2 Diesel mated to 6R80 for some time and its getting worst .
My observations are , low rpms not much pull, engine surge to 2200 to 2500rpm even for small move in city , like a petrol engine. There are no DTC yet . EGR got cleaned, used liquimoly injector cleaner which made the engine sound smoother. There is a hissing noice from engine right bay , dealer inspected the intercooler pipes and said its looks fine.

I got ForScan and observed few things , the VGT is quite often run in open loop. Second major observation with TCM is the TorqueConverter desired and actual slips are quite vary Screenshot 2024-05-03 195452.jpg20240502_173350.pngScreenshot 2024-05-03 195452.jpg20240502_173350.png