Originally Posted by Mr GCSRT8
If you are still experiencing the problem in SPORT mode then the TSB Flash will not correct your concern
Sorry for the old thread resurrection but I have a vehicle built after the date on the TSB that has the same bad clunking in the rear. I removed everything from the back, spare, spare cover, jack, everything and the problem didn't go away.
On a whim I put the truck in sport and track mode on a road that makes it pound really bad and the noise pretty much went away. That proves there's nothing loose in the rear.
Now, I just hope the dealer doesn't play games with the TSB, saying my truck isn't eligible because it was built after the date on the notice......