Hi, guys, I have read contradicting reports that you can install zerk fittings on the oem ball joints on the 4th generation vans. Can someone please clarify this. I have a 2006 Caravan and from what I've observed is that there is a plug type fitting underneath the ball joint where a zerk/grease fitting normally is found. Is it possible to to unscrew or pop off that fitting and replace it with a grease fitting, has anyone successfully done this. I did read somewhere that people have take those plugs out and fitted 6mm or 1/4" grease fittings in it's place. Is this possible and are the replacement grease fittings nice and tight in there? Do they screw into place? Please advise. Thanks.