Even with good tire pressure (about let's say 35 PSI) the rear behavior won't be excellent. Mine is stock, and rear bounce and dance since day one (truck was new) The OEM leaf spring are not high quality and it can be good to make a switch for Deaver or something else. But definitely need to do something for a better ride from rear. The must is 5 links gen 3 ( may be one day for my 20's I will do) Also ,set the skocks harder as sport mode for exemple help a little !