I have a 2002 TJ and when shifting into 4wd Lo it slips out of 4wd Lo. I did some research and have been told I can adjust the linkage or replace. Is it necessary to replace or can I adjust the linkage and save $86 on the TerraFlex part? Any suggestions on how to adjust. YouTube vids or pics would be greatly appreciated. I also have a 3.5 lift with 18" rims on 305/70/18.