Best thing you can do is greese and oil, grease and oil. Use the best oil available. In my TDT I use Amsoil HDD This stuff has an extended service of 25,000 miles or one year. Change the filter every 3000 miles. I use Amsoil synthetic trans fluid and diff oil as well. Read up on it here http://www.synthetic-oil-tech.com/d.cgi/1359048/index.htm

It is the best period.