It Can Be Anything.....A Refilled Shock Gets Hard ALSO...Previous History Can Tell Actually What Happen...Maybe Some HARD Spring Used For CNG Purpose.......!! A Refilled ShOCK With Some MOTa Aaail
For Refilling They Use MOTaa Aaail , Patlaa Aaail Logic ...Don't Confuse Yourself....Just Get The NEW And End This If Your Shock Is Leaking
Else You Will Be Watching There Faces 4 Times In A Month Guarantee....!!