drive a 08 2500 cummins wit a 6.7L. I have recently had two prob. vibration that first started bout 2 months ago and just went away. couple weeks ago it came back and did it twice within 10 min. every time running bout 70-75 mph. checked eveything i know and not found nothin. also when shuttin off engine turbo makes almost like a roaring sound but not everytime i shut off that also comes and goes. has anyone had these issues? if so what caused them what did u do to fix them..

 

ok....after further research and eval i have found that the vibration is better know as the "death wobble"! has anyone experienced this and if so what is the fix for it?

 

Let me help you by moving this to the CTD section.

 

Do you let the turbo spool down before shutting the engine?


If you are doing 60 or 70 on the interstate and stop for fuel give it a minute before shutting down. When I drive home the last couple miles are under 30 MPH and the last 1/2 mile is 5 to 10 MPH so there is no need to spool down, but if I stop off at a interstate rest stop after doing 70 MPH I wait a minute.

The reason is the turbo spins at tens of thousands of RPM but you turn off the engine the oil pump stops and the turbo is spinning tens of thousands of RPM with no lube.