First of all I'd use a brand name, Valvoline, castrol, quaker state. I personnally prefer Castrol products (just brand loyalty). The other big names probably just as good. Secondly I'd use DEXTRON 4. Apparently I've been told it's semi synthetic. Used this in my power steering pump. DEXTRON 3 would be another choice. 3 has been around for years. 4 is somewhat new on the market.

Keep the Shiney Side up. Support our troops.