Not to go overboard but my rear suspensions are having some squish sound when ever I hit, lets say a speed bump or something un-leveling. I can even rock the truck side-to-side and hear the squish or tish sound. Any ideas?

 

Mine is dropping in the back also. It started a couple weeks ago. It takes about 48 hrs to drop all the way down. Both sides are going down together. I replaced the air bags with Arnott's about 6 months ago. Is this likely to be the bags, or should I be looking at the compressor and valves?

 

First, if you need bags, buy direct from Arnott Industries only.
Second if both sides drop at the same time, the chances of it being the air bags is slim because they both won't fail at the same time and they are not connected together so one won't cause the other to deflate.
If you can't find the problem, send me you tele number and I'll call you.