- Joined
- Mar 20, 2016
- Posts
- 10,791
- Reaction score
- 16,932
- Ram Year
- 2015
- Engine
- 3.0 EcoDiesel
One of the highlight changes for the Gen4 trucks starting in 2009 was the coil spring rear suspension. The 2500s didn't get the coil suspension till 2014 but the OP has a 1500.It could be that your previous 2011 had leaf springs whereas your newer one has coil springs.
Something has changed most likely on the OP's truck causing the rocking.