DPF System causing vibration during accelertion?

I have been having the same issue I think, I can tell you what Detroit came up with after 3 years of troubleshooting

 

delete post

 

i bought 2019 cascadia and this truck have above mentioned vibration .
I disconected drive shafts. Slip joints are frozen . no way to move in out by hand . This truck was parked about 8 months near Chicago. Driveline is Meritor. I put some wd40 and grease inside from back hole. I hope by driving 2000 miles slip joint will perform as needed.
I will try to find time to remove dpfs and inspect them...

 

tell us what was the fix

 

look what i have found...

 

Hey friend, did you find out what was wrong with your truck I have the same issue going on, dunno what to do please advise me too

 

I HAVE ABSOLUTELY THE SAME ISSUE ON MY FRTL cascadia 2020. 505k miles. Please share if you found out what was causing the vibration

 

I have absolutely the same issue sir. I drive 2020 Cascadia. Please advise what fixed your problem

 

Did you check out the attached file in post #24? It looks like the problem may be by design.