As Rick says, I use only ATF Dexron 3 (or ATF type 'F') in the Borg Warner chain drive TF cases in RR's, and 75w90 in LT230's, 80w90 in diffs and swivels. In the R380 I use either Dex3 OR 75w85 Synthetic Duragear, or Caltex MTF94 which is OE recommended. In the LT77, I use only ATF dexron3 OR ATF type'F'.
JC

