One problem related to transfer case has been reported for the 2003 Lincoln Aviator. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Lincoln Aviator based on all problems reported for the 2003 Aviator.
The differential and transfer case both need to be replaced. I have had 2 mechanics look at it and they are both saying that the differential and transfer case both need to be replaced.