Iam rebuilding my dana 20 transfercase. when I took out the seal in the bearing retainer thats in the adapter.The seal that I ordered is not a double lip seal.seal number on new seal is 13705.I called the bronco place and they said it was a double lip seal.The seal that came out of the adapter has two lips and each lip has a spring.The seal I recieved has one lip and one spring and a small thin lip with no spring.Should I use it or get one that matches the old one?