Ok update on my 2020 Y78 recall. Soon after the recall was completed, maybe a couple of days, I noticed surging and it started doing regens about every 30 miles, I couldn't get an appointment again for almost 3 weeks. After about 2 weeks of this it was running even worse and then the regen failed, the gauge went to a red bar at 100% full. It said power reduced see dealer. Took to a dealer a couple of miles from my house and they found the Charge Air tube boot had about a 2 inch tear in it. They said that they believe the other dealer had installed crooked when doing Y78 and the clamp over the crooked pipe caused the tear. End of story, got a new DPF and charge tube, the charged me $788.00 for the charge tube installed. I went to the previous dealer who says they didn't remove the charge tube but would reimburse me since they were the last to touch. Truck seams to be running better than ever, took it on a drive yesterday, freeway and city driving was getting over 22mpg.