[joedoh]

I have had a lot of air systems on trucks. a LOT. usually when I have a stiff ride its because there is too much air in the bags. this can happen two ways, the first is me filling them too much for ground clearance. I will usually ride as low as I can to have the lowest spring rate, and make a mental note of big bumps and cracks in the roads that make me bottom out, which isnt as bad as it sounds, after 6 months you will see a dip or bump coming and wont even wince. it wont kill you to let some air out and see if maybe you were rolling around "locked up" which is the hydraulics guys term for full stroke that leaves you without any spring.

the second way is related to setup. I always set up the bag so that it squishes completely, I mean the last breath of pressure comes out just as the bag hits the internal bump stop. If you install bags where the mounts arent high enough, thats easy to figure out because the truck wont hit the ground. but if you set them too HIGH, there is all this volume in the bag that isnt related to lifting the truck and requires pressure to fill before any lifting even occurs. this is also pretty easy to identify, measure the squished height of the bag from plate to plate and make sure it is right at the min height of the bag. if you cant measure with the bag in, take it out, or my favorite shortcut is to put the tires on a 2x4 or 2x6 and let the air out. if the truck keeps going down past the tires, you have too much wasted drop, which will limit your lift too! this shortcut only works if you have extra stroke in your suspension, so dont try it if your tie rods just kiss the frame at full drop.

other than that, shocks are a big deal. I use as long a shock as I can. also alignment can make the truck ride rough.

good luck!