| 4wd not engaging I have a 2002 kia sportage 2dr ( jeep?) Best condition, lowest miles and cheapest I could find at the time. Mileage has dropped from 25/27 to 22/24 this winter ?? But that is a different issue. 4wd Mine is a manual transfer case, but the front is vacuum operated hubs. There has been issues with the seals leaking at the hubs, improved in 2000 ? Time, age and wear will make vacuum leaks that will prevent the front from locking in. Marvis |