I am in the process of a major checkover/servicing of my 1999 Durango 4X4. It has 150k on it, and I want to change oil in diffs & transfer case. I have done a search & found some posts (by Steve Keim - keimmmo) where he said he ran 5w30 synthetic oil in his transfer case of his 01. 5 CTD. I knew Steve personally. Saddly, he passed away in March of 2007. Do you know if this will also work in the transfer case of my Durango? It is the simple 2H, 4H, N, 4L case.