Has anyone else experienced shuddering at highway speeds under acceleration? Has happened a couple of times to me. I think may be associated with "Exhuast Cleaning"...But wondering if anyone else has had same issue on the 6.7L. I'm at about 6k miles now. Thx!

 

Hey GlobalPilot,

Since you're concerned, I'd recommend swinging by your dealership so they can take a look. If you'd like, I can arrange for your regional customer service manager to get involved. Just send over your details in a PM, including your full name, best daytime phone number, VIN, current mileage, and servicing dealership.

Crystal

 

In the meantime, try manually down shifting to increase RPMs as some say that stops the shudder. The exhaust cleaning typically lasts 20-30 miles so when you have the problem it can be long after you see the message flash on the screen.
It is a known problem where the valve stem/guide is insufficient on some engines and causes binding during regens. You may be told it is normal, but replacing the left head can fix the problem if the new head is checked for proper clearance by having the valve springs pulled.
Good luck.

 

I get a big lag here and there, but no shudder