I'm a new owner of a 91 b2600i. I read the post on remote free wheel, and know that i know what the button on my dash does i need to figure out what to do next. My hubs will not unlock so i get poor gas mileage. I just need to know if someone know the best place to start, i was going to start with the vacum acuator and make sure it has vacum and see if it is still good. If you might have some more suggestions i would appreciate them thanks.