[Lins]

Maybe off the build date? I just know it was halfway thru either the 2011 or 2012 year.

 

[Lins]

Looks like Feb 2011 according to this:

5.9L, 6.7L Cummins Horsepower & Torque By Model Year

Horsepower and torque for every model year (1989 to current) 5.9L and 6.7L Cummins equipped Dodge and Ram pickups.

www.dieselhub.com

 

[Lins]

You should have the HO with the 68RFE. The HO term was used again later on when the Aisin was introduced.

 

[Lins]

Your 2011 will have the HO badge on the tailgate if indeed it has that motor well, unless someone has debadged it. My late production 2011 has the HO with said badge.

He said that in his first post, but that they can also easily be swapped.