Hi, I recently purchased a 89 jeep wrangler yj with the 4.2l v6. I am having trouble with the fourwheel drive. It has two shifters in the floor but no marks to know what is what. I have played around with it and can get it to engage just kinda weird config because both shifters an go all the way up and all the way down. Any ideas on what is what because I am lost here and really want to get in the mud where my jeep belongs lol. I installed the posi loc on it to rid myself of the vacuum woes as well. Thanks for any info.