My question involves vehicle registration or title in the state of: TN

My father passed away in March 2010. He had not made a truck payment since at least January. I have not heard anything from the finance company, and the truck has not been moved. I did find the prior loan contract on the vehicle which had the life insurance included in the policy for me to be the beneficiary if anything happened to him. In that case the truck would have been paid off and would be mine. But that contract expired in 2008, and I haven't been able to find the current contract. So my question is how long can they leave the truck here before repossessing it? And is there a time frame which it could be considered abandoned property on their part? It has been at least 7 months since the last payment.