I added a 2" leveling kit and Nitto Terra grapplers a few months ago. Seems like when I first got my truck back it rode fine but now it rides real rough. Do I need longer shocks or just a front end alignment or both?
If you didn't get it alligned right after putting the leveling kit on then yes....do it today. I've got the same leveling kit and I've been told by many credible sources that longer shocks aren't necessary unless you plan on off-roading and are flexing your suspension to full articulation. It's up to you, I've also heard that the stock shocks are crap and replacing them is always a good idea. I haven't done mine yet because I plan on putting a 3" lift on so I'll have to replace the shocks then. Good luck, hope this helps.
Alignment is important, but it shouldn't affect the ride; just tire wear and directional control. How much air in the tires? It's also possible a shock has failed and become too stiff. Maybe something is binding.
X2 on tire pressure, on my previous truck I bought a set of 285/70/17 Nitto Terra's and the shop had 50 lbs of pressure in them. I finally got them down to 30 lbs doing the chalk test, much better ride w/the right air pressure.