I have a peterbilt 379 C-15 acert 10/13 eaton fuller . Pre. Ims. 134000 or so and all of a sudden I get black flakes when I start up now . It all started last week going a 75 mph from slc to Laramie.? Did I screw it up.
I'm tires so maybe I'm missing it, but what is a 10/13 transmission? And agree just soot breaking loose from pipes. Likely from rain