This is no doubt your slip yoke in your driveshaft. Those splines become dry and thats when you feel the slack your feeling. You need to pump it full of grease but make sure to use a grese like Amsoil with 5% MOLY. Regular bearing grease w/o 5% moly won't do the trick. I highly doubt that it's...
My AHC is currently operating ok. However when we put out boat trailer on the vehicle the springs ( rear ) have shown their age. What OME spring can I use that would pretty much keep the stock height so that the AHC would still be useable but add the stiffness and strength so a boat trailer...