Thanks. The reason I was asking is because my trucks seems to be bouncing more over bumps now and rolling a little more in turns. Don't know if this is a simply a result of worn shocks that eventually need replacing, or if it's a result of the weight that I've added to the truck and the shocks need revalving (or still replacing), or if it might be the result of something as simple as worn sway bar bushings!
I'm going to say both age and weight.
After adding all the gear to my truck I decided to run it over a CAT scale one day on the way back from a weekend trip. Since I was returning home I didn't have full water or food but did have my gear on board. Without people it was over 7000lbs. Yeah...heavy.
All that weight means the air suspension increases the spring pressure to maintain ride height. Throw into the mix that I run Johnson rods, so a 2" lift full time which means even higher spring pressures. Normally you would want stiffer shock valving to control those stiffer springs but that's not an option with the LR3 as nobody makes firmer shocks, only stock valving. To compound that the trucks are pretty soft to start with.
So while your stock aging struts may be getting tired I wouldn't expect a night and day difference with new stock parts. The ideal would be if somebody out there started offering a firmer shock but I haven't heard of such a thing.