Dowel Pin fell? Chances are your timing case/gear housing got cracked in the process as the gears tend to wedge the pin against the gearcase.
The new design does NOT allow the dowel pin to drop as the end is beveled. Be sure to install a new pin as it is crucial to ensure proper gearcase alignment.
This genuine Cummins gear case will get you back on the road again.
Gearcase only, ships from WI.
You can read more about the killer dowel pin issue here
Cummins part number 3936256, which superceded from Cummins part number 3920519.