Originally Posted by stx4x4
have the same issue here, 2013 ram, when at 40, feel small vibrate, 39 or 41 its gone, it almost feels like its in a lower gear then it should be! going to see what the dealer has to say!
Before you go to the dealer, do what was suggested a couple of posts back. It's most likely your MDS kicking in.
Please let us know what the dealer says.